Glc63 engine temp issue
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Newbie
Joined: Nov 2021
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2021 glc63s
Glc63 engine temp issue
Hi
got a weird issue with my new glc63s. Getting a cel and dealer tells me it’s a p012880 code. Engine not getting up to temp. Dealer says car is running fine. No temp issue at all. Mercedes says I will meet a software patch to fix it. I was told I wasn’t the only one with this issue. Tried googling this issue but found nothing. Anyone hear anything about this issue? Looks like it may be a while till I get my software patch according to my dealer.
got a weird issue with my new glc63s. Getting a cel and dealer tells me it’s a p012880 code. Engine not getting up to temp. Dealer says car is running fine. No temp issue at all. Mercedes says I will meet a software patch to fix it. I was told I wasn’t the only one with this issue. Tried googling this issue but found nothing. Anyone hear anything about this issue? Looks like it may be a while till I get my software patch according to my dealer.
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Joined: Nov 2018
Posts: 11,398
Likes: 5,322
From: San Francisco Bay Area
2019 C63CS
This issue commonly happens if the thermostat is faulty and stuck open or opening prematurely, or the coolant temp sensor is faulty. Have not heard of there being a software issue in the V8 causing this. Theoretically, there can be a software issue as the ECU calculates based on the ambient temperature how long it should take the engine to reach operating temperature and if it takes longer, then this fault code is thrown. So it could be that there is a bug with this calculation if your thermostat and coolant temp sensor is working otherwise, but as said, have not read about such an issue with this engine. Here's a recent thread from somebody having this issue with a new C63 and as expected the thermostat was faulty and all is fixed after replacing it.
https://mbworld.org/forums/c63-c63s-...ode-p0128.html
https://mbworld.org/forums/c63-c63s-...ode-p0128.html
Newbie
Joined: May 2020
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c63s
Was wondering if you ever got a fix to this. Mine (2020 GLC63) has been in the shop for almost three weeks now for this exact same thing. They did a thermostat (it was stuck open) but for the last two weeks have been trouble shooting it since they keep getting the same code. Quite frustrating since it is a new car (to me) with only around 7k miles. Thanks
Newbie
Joined: Mar 2025
Posts: 11
Likes: 1
Same issue here
Hi there,
I know it’s been a while but do you remember what fixed your CEL back then. I’m also dealing with the situation. I got a 2021 GLC63s with 42k km.
Thanks
I know it’s been a while but do you remember what fixed your CEL back then. I’m also dealing with the situation. I got a 2021 GLC63s with 42k km.
Thanks
Was wondering if you ever got a fix to this. Mine (2020 GLC63) has been in the shop for almost three weeks now for this exact same thing. They did a thermostat (it was stuck open) but for the last two weeks have been trouble shooting it since they keep getting the same code. Quite frustrating since it is a new car (to me) with only around 7k miles. Thanks
Out Of Control!!
Joined: Apr 2019
Posts: 11,921
Likes: 6,769
From: Silicon Valley
W212 MY'14 M276-3.5NA @75kMi
COMPUTER BS FAULT
The disjointed heat mgt of Bosch ECU is whats causing poor temp control. Don't be alarmed!
The fault is thrown because its winter and the ECU mapped Tstat is over cooling in Winter and under cooling in Summer.
Over cooling water is the best thing that can happen to help lessen dry-pistons heat soaks. That's a sweet problem to have now... sit on that until summer heat show up.
Overall, consider this "false positive" in Winter as an examplication of poor temp control.
Only if you get this fault in Summer, you'll want to find out why your engine is reported as being "over cooled" AND STILL accumulate extreme heat at the same time.... MOD-0.
Both conditions should be mutually exclusive: either heat or cool not both.
Long story short: this is a "Nervous-Nelly" false service call for a$2,500 busy repair.
Stay put until summer.
> Normalizing Heat Mgt:
Instead get interested in cancelling heat soaks so engine no longer run fan to remove heat in winter... duh!
> PARADOXICAL Question:
-- Considering the large size of the engine coolant radiator,
-- How is radiator alone not capable of dropping engine heat in winter ???
> PREMATURE AGING:
-- The topic of heat Mgt is essential to LONGEVITY vs. premature powertrain failures.
-- Extreme heat effectively waste all the engine/tranny seals that become useless at holding pressure.... super leaker.
> INCENTIVES... WHY ???
-- Once you Get Serious Heat Mgt working normally you can give the TT powertrain a great workout without endless repairs or shortlife.
Don't ignore burning oil into rings with EXTREME HEAT.
The fault is thrown because its winter and the ECU mapped Tstat is over cooling in Winter and under cooling in Summer.
Over cooling water is the best thing that can happen to help lessen dry-pistons heat soaks. That's a sweet problem to have now... sit on that until summer heat show up.
Overall, consider this "false positive" in Winter as an examplication of poor temp control.
Only if you get this fault in Summer, you'll want to find out why your engine is reported as being "over cooled" AND STILL accumulate extreme heat at the same time.... MOD-0.
Both conditions should be mutually exclusive: either heat or cool not both.
Long story short: this is a "Nervous-Nelly" false service call for a
Stay put until summer.
> Normalizing Heat Mgt:
Instead get interested in cancelling heat soaks so engine no longer run fan to remove heat in winter... duh!
> PARADOXICAL Question:
-- Considering the large size of the engine coolant radiator,
-- How is radiator alone not capable of dropping engine heat in winter ???
> PREMATURE AGING:
-- The topic of heat Mgt is essential to LONGEVITY vs. premature powertrain failures.
-- Extreme heat effectively waste all the engine/tranny seals that become useless at holding pressure.... super leaker.
> INCENTIVES... WHY ???
-- Once you Get Serious Heat Mgt working normally you can give the TT powertrain a great workout without endless repairs or shortlife.
Don't ignore burning oil into rings with EXTREME HEAT.
Last edited by CaliBenzDriver; Mar 9, 2025 at 01:07 AM.
Newbie
Joined: Mar 2025
Posts: 11
Likes: 1
Thank you for the prompt response!
My vehicle still has comprehensive warranty till mid April 2025 and another 2 years of limited star warranty. So I will be taking it back tomorrow to deal with it before it’s too late.
I wouldn’t want to drive it with a check engine light anyway because how would you know if another issue that came up and now there are 2 codes?
Also, after paying a prime price for a certified vehicle with low KM, I expect it to be trouble free for some time. That issue came up after 3-4 days of taking delivery!
They changed a thermostat on Thursday and a radiator because they broke the fan mounts. A day later light is back on and same code. I will mention the ECU issue to them tomorrow.
I will keep you posted.
Thanks again
My vehicle still has comprehensive warranty till mid April 2025 and another 2 years of limited star warranty. So I will be taking it back tomorrow to deal with it before it’s too late.
I wouldn’t want to drive it with a check engine light anyway because how would you know if another issue that came up and now there are 2 codes?
Also, after paying a prime price for a certified vehicle with low KM, I expect it to be trouble free for some time. That issue came up after 3-4 days of taking delivery!
They changed a thermostat on Thursday and a radiator because they broke the fan mounts. A day later light is back on and same code. I will mention the ECU issue to them tomorrow.
I will keep you posted.
Thanks again
The disjointed heat mgt of Bosch ECU is whats causing poor temp control. Don't be alarmed!
The fault is thrown because its winter and the ECU mapped Tstat is over cooling in Winter and under cooling in Summer.
Over cooling water is the best thing that can happen to help lessen dry-pistons heat soaks. That's a sweet problem to have now... sit on that until summer heat show up.
Overall, consider this "false positive" in Winter as an examplication of poor temp control.
Only if you get this fault in Summer, you'll want to find out why your engine is reported as being "over cooled" AND STILL accumulate extreme heat at the same time.... MOD-0.
Both conditions should be mutually exclusive: either heat or cool not both.
Long story short: this is a "Nervous-Nelly" false service call for a$2,500 busy repair.
Stay put until summer.
> Normalizing Heat Mgt:
Instead get interested in cancelling heat soaks so engine no longer run fan to remove heat in winter... duh!
> PARADOXICAL Question:
-- Considering the large size of the engine coolant radiator,
-- How is radiator alone not capable of dropping engine heat in winter ???
> PREMATURE AGING:
-- The topic of heat Mgt is essential to LONGEVITY vs. premature powertrain failures.
-- Extreme heat effectively waste all the engine/tranny seals that become useless at holding pressure.... super leaker.
> INCENTIVES... WHY ???
-- Once you Get Serious Heat Mgt working normally you can give the TT powertrain a great workout without endless repairs or shortlife.
Don't ignore burning oil into rings with EXTREME HEAT.
The fault is thrown because its winter and the ECU mapped Tstat is over cooling in Winter and under cooling in Summer.
Over cooling water is the best thing that can happen to help lessen dry-pistons heat soaks. That's a sweet problem to have now... sit on that until summer heat show up.
Overall, consider this "false positive" in Winter as an examplication of poor temp control.
Only if you get this fault in Summer, you'll want to find out why your engine is reported as being "over cooled" AND STILL accumulate extreme heat at the same time.... MOD-0.
Both conditions should be mutually exclusive: either heat or cool not both.
Long story short: this is a "Nervous-Nelly" false service call for a
Stay put until summer.
> Normalizing Heat Mgt:
Instead get interested in cancelling heat soaks so engine no longer run fan to remove heat in winter... duh!
> PARADOXICAL Question:
-- Considering the large size of the engine coolant radiator,
-- How is radiator alone not capable of dropping engine heat in winter ???
> PREMATURE AGING:
-- The topic of heat Mgt is essential to LONGEVITY vs. premature powertrain failures.
-- Extreme heat effectively waste all the engine/tranny seals that become useless at holding pressure.... super leaker.
> INCENTIVES... WHY ???
-- Once you Get Serious Heat Mgt working normally you can give the TT powertrain a great workout without endless repairs or shortlife.
Don't ignore burning oil into rings with EXTREME HEAT.
Out Of Control!!
Joined: Apr 2019
Posts: 11,921
Likes: 6,769
From: Silicon Valley
W212 MY'14 M276-3.5NA @75kMi
Rock & Hard Place
Thank you for the prompt response!
My vehicle still has comprehensive warranty till mid April 2025 and another 2 years of limited star warranty. So I will be taking it back tomorrow to deal with it before it’s too late.
I wouldn’t want to drive it with a check engine light anyway because how would you know if another issue that came up and now there are 2 codes?
Also, after paying a prime price for a certified vehicle with low KM, I expect it to be trouble free for some time. That issue came up after 3-4 days of taking delivery!
They changed a thermostat on Thursday and a radiator because they broke the fan mounts. A day later light is back on and same code. I will mention the ECU issue to them tomorrow.
I will keep you posted.
Thanks again
My vehicle still has comprehensive warranty till mid April 2025 and another 2 years of limited star warranty. So I will be taking it back tomorrow to deal with it before it’s too late.
I wouldn’t want to drive it with a check engine light anyway because how would you know if another issue that came up and now there are 2 codes?
Also, after paying a prime price for a certified vehicle with low KM, I expect it to be trouble free for some time. That issue came up after 3-4 days of taking delivery!
They changed a thermostat on Thursday and a radiator because they broke the fan mounts. A day later light is back on and same code. I will mention the ECU issue to them tomorrow.
I will keep you posted.
Thanks again
Can you inquire about the service record?
Revent change of hand the selling dealer can not fix... what I explained about heat Mgt is beginning to make good sense.
The ECU learns to over cool in anticipation for storred heat getting circulated only above 3500.Rpm.
In winter this scheme sets a code!
Year round it's inefficient at normal driving Rpm.
Lets say dealer gets wise to keep you from trading... they reset the learned Tstat map.
It will stay fixed for 2 Mo then return - Then dealer can claim its normal in summer...
The only way I know how to fix this genuine fault is by circulating piston heat at normal driving Rpm... BUT that's a non-stock experimental setup. A case of warranty exclusion.
Last edited by CaliBenzDriver; Mar 9, 2025 at 10:45 PM.
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Joined: Mar 2025
Posts: 11
Likes: 1
Hello,
just a quick update about the P0128 issue. After multiple visits and the replacement of thermostat, radiator (due to tabs breaking), a second system bleed recommended by Benz Germany, coolant shut off valve and both oil separators seals (due to sweating), I picked it up today and drove back to work. On my way home, light came back on. I didn’t scan it yet but I assume same one is back. I will confirm tomorrow.
I am going to push for an ECU replacement if same code is back on.
I'm not sure what else to do other than trying to return it as being a “lemon”. I’ve had it for 3 months and they drove it more than I did lol.
It’s unfortunate that this is happening. Such a good looking SUV, low KM and fully loaded.
just a quick update about the P0128 issue. After multiple visits and the replacement of thermostat, radiator (due to tabs breaking), a second system bleed recommended by Benz Germany, coolant shut off valve and both oil separators seals (due to sweating), I picked it up today and drove back to work. On my way home, light came back on. I didn’t scan it yet but I assume same one is back. I will confirm tomorrow.
I am going to push for an ECU replacement if same code is back on.
I'm not sure what else to do other than trying to return it as being a “lemon”. I’ve had it for 3 months and they drove it more than I did lol.
It’s unfortunate that this is happening. Such a good looking SUV, low KM and fully loaded.
That makes aot of sense: fix one CEL at the time ASAP.
Can you inquire about the service record?
Revent change of hand the selling dealer can not fix... what I explained about heat Mgt is beginning to make good sense.
The ECU learns to over cool in anticipation for storred heat getting circulated only above 3500.Rpm.
In winter this scheme sets a code!
Year round it's inefficient at normal driving Rpm.
Lets say dealer gets wise to keep you from trading... they reset the learned Tstat map.
It will stay fixed for 2 Mo then return - Then dealer can claim its normal in summer...
The only way I know how to fix this genuine fault is by circulating piston heat at normal driving Rpm... BUT that's a non-stock experimental setup. A case of warranty exclusion.
Can you inquire about the service record?
Revent change of hand the selling dealer can not fix... what I explained about heat Mgt is beginning to make good sense.
The ECU learns to over cool in anticipation for storred heat getting circulated only above 3500.Rpm.
In winter this scheme sets a code!
Year round it's inefficient at normal driving Rpm.
Lets say dealer gets wise to keep you from trading... they reset the learned Tstat map.
It will stay fixed for 2 Mo then return - Then dealer can claim its normal in summer...
The only way I know how to fix this genuine fault is by circulating piston heat at normal driving Rpm... BUT that's a non-stock experimental setup. A case of warranty exclusion.
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Out Of Control!!
Joined: Apr 2019
Posts: 11,921
Likes: 6,769
From: Silicon Valley
W212 MY'14 M276-3.5NA @75kMi
THE BEST OR SOMETHING
Hello,
just a quick update about the P0128 issue. After multiple visits and the replacement of thermostat, radiator (due to tabs breaking), a second system bleed recommended by Benz Germany, coolant shut off valve and both oil separators seals (due to sweating), I picked it up today and drove back to work. On my way home, light came back on. I didn’t scan it yet but I assume same one is back. I will confirm tomorrow.
I am going to push for an ECU replacement if same code is back on.
I'm not sure what else to do other than trying to return it as being a “lemon”. I’ve had it for 3 months and they drove it more than I did lol.
It’s unfortunate that this is happening. Such a good looking SUV, low KM and fully loaded.
just a quick update about the P0128 issue. After multiple visits and the replacement of thermostat, radiator (due to tabs breaking), a second system bleed recommended by Benz Germany, coolant shut off valve and both oil separators seals (due to sweating), I picked it up today and drove back to work. On my way home, light came back on. I didn’t scan it yet but I assume same one is back. I will confirm tomorrow.
I am going to push for an ECU replacement if same code is back on.
I'm not sure what else to do other than trying to return it as being a “lemon”. I’ve had it for 3 months and they drove it more than I did lol.
It’s unfortunate that this is happening. Such a good looking SUV, low KM and fully loaded.
Returning it is a good way to prevent the nightmare to continue on your dime with no recourse.
MB personnel are forced to strictly follow procedure. It can be fixed but not by standard MB procedure.
Eventually the lemon will be sold as-is at auction and a good mechanic will pin point the issue and a fix to turn up a profit.
+++ At that stage I'd look at ECU data for something out of range related to dault code.
Just about all related parts have been replaced.
On the other hand these engines accumulate extreme heat in dry pistons to "save gas" - Can fault be related to poor heat circulation?
Last edited by CaliBenzDriver; May 9, 2025 at 02:19 AM.
MBWorld God!
Joined: Dec 2019
Posts: 32,217
Likes: 6,275
It's disturbing when the best Mercedes tech and support engineers fail are unable to repair a low mileage chassis.
Returning it is a good way to prevent the nightmare to continue on your dime with no recourse.
MB personnel are forced to strictly follow procedure. It can be fixed but not by standard MB procedure.
Eventually the lemon will be sold as-is at auction and a good mechanic will pin point the issue and a fix to turn up a profit.
+++ At that stage I'd look at ECU data for something out of range related to dault code.
Just about all related parts have been replaced.
On the other hand these engines accumulate extreme heat in dry pistons to "save gas" - Can fault be related to poor heat circulation?
Returning it is a good way to prevent the nightmare to continue on your dime with no recourse.
MB personnel are forced to strictly follow procedure. It can be fixed but not by standard MB procedure.
Eventually the lemon will be sold as-is at auction and a good mechanic will pin point the issue and a fix to turn up a profit.
+++ At that stage I'd look at ECU data for something out of range related to dault code.
Just about all related parts have been replaced.
On the other hand these engines accumulate extreme heat in dry pistons to "save gas" - Can fault be related to poor heat circulation?
Forum member Frenetic's GLE 53 was an example.
MBWorld God!
Joined: Dec 2019
Posts: 32,217
Likes: 6,275
Hello,
just a quick update about the P0128 issue. After multiple visits and the replacement of thermostat, radiator (due to tabs breaking), a second system bleed recommended by Benz Germany, coolant shut off valve and both oil separators seals (due to sweating), I picked it up today and drove back to work. On my way home, light came back on. I didn’t scan it yet but I assume same one is back. I will confirm tomorrow.
I am going to push for an ECU replacement if same code is back on.
I'm not sure what else to do other than trying to return it as being a “lemon”. I’ve had it for 3 months and they drove it more than I did lol.
It’s unfortunate that this is happening. Such a good looking SUV, low KM and fully loaded.
just a quick update about the P0128 issue. After multiple visits and the replacement of thermostat, radiator (due to tabs breaking), a second system bleed recommended by Benz Germany, coolant shut off valve and both oil separators seals (due to sweating), I picked it up today and drove back to work. On my way home, light came back on. I didn’t scan it yet but I assume same one is back. I will confirm tomorrow.
I am going to push for an ECU replacement if same code is back on.
I'm not sure what else to do other than trying to return it as being a “lemon”. I’ve had it for 3 months and they drove it more than I did lol.
It’s unfortunate that this is happening. Such a good looking SUV, low KM and fully loaded.
Out Of Control!!
Joined: Apr 2019
Posts: 11,921
Likes: 6,769
From: Silicon Valley
W212 MY'14 M276-3.5NA @75kMi
The only way out of that is either:
-- wrench yourself to fix it. We can help.
-- or pay a shop out of pocket to fix it not using failed MB procedures!
-- else it's a genuine money pit.
-- wrench yourself to fix it. We can help.
-- or pay a shop out of pocket to fix it not using failed MB procedures!
-- else it's a genuine money pit.
Last edited by CaliBenzDriver; May 10, 2025 at 03:37 PM.
MBWorld God!
Joined: Dec 2019
Posts: 32,217
Likes: 6,275
Ya best course of action for OP is lemon it, why deal with this stress and pain when there are so much in life already, enjoy the next vehicle.
Out Of Control!!
Joined: Apr 2019
Posts: 11,921
Likes: 6,769
From: Silicon Valley
W212 MY'14 M276-3.5NA @75kMi
This serves as proof automotive computers are useless to help troubleshooting. They are built to pass minimal requirements to easy repairs.
Case in point the marginal engine timings causing poor driveability.
The No1 deal braker is how bottkenecked CAN are able to disfuntion quietly.
Bosch invented CAN Networking, you'd think they could do better to expose much needed troubleshooting metrics in Bosch computers.
Lemons are a by-product.
Case in point the marginal engine timings causing poor driveability.
The No1 deal braker is how bottkenecked CAN are able to disfuntion quietly.
Bosch invented CAN Networking, you'd think they could do better to expose much needed troubleshooting metrics in Bosch computers.
Lemons are a by-product.
Last edited by CaliBenzDriver; May 11, 2025 at 01:25 PM.
MBWorld God!
Joined: Dec 2019
Posts: 32,217
Likes: 6,275
This serves as proof automotive computers are useless to help troubleshooting. They are built to pass minimal requirements to easy repairs.
Case in point the clunky engine causing poor driveability.
The No1 deal braker is how bottkenecked CAN suck quietly.
Bosch invented CAN Networking, you'd think they could do better to expose much needed troubleshooting metrix!
Case in point the clunky engine causing poor driveability.
The No1 deal braker is how bottkenecked CAN suck quietly.
Bosch invented CAN Networking, you'd think they could do better to expose much needed troubleshooting metrix!
Out Of Control!!
Joined: Apr 2019
Posts: 11,921
Likes: 6,769
From: Silicon Valley
W212 MY'14 M276-3.5NA @75kMi
limited manageability
I guess the problem is the computer thinks it is smart so it speaks different languages than humans, so humans (mechanics) don't know how to communicate with it hence why we need computers to talk to computers (interpreter). Except that interpreter computer can't understand what in the world the computer is talking about as that computer itself don't know what it wants to express or talk about. So everything got lost in transition.
Computers are purpose built systems, not sci-fi machines.
When factory engineers can not troubleshoot disfunctional systems, that's a call for action.
System Mgt computers need system mgt tools.
Xentry coverage fails to help MB support experts...
Last edited by CaliBenzDriver; May 11, 2025 at 02:16 PM.
MBWorld God!
Joined: Dec 2019
Posts: 32,217
Likes: 6,275
yes, lost in translation
Computers are purpose built systems, not mystery machines.
When factory engineers can not troubleshoot disfunctional systems, that's a call for action.
System Mgt computers need system mgt tools.
Xentry coverage fail to help MB support specialists.
Computers are purpose built systems, not mystery machines.
When factory engineers can not troubleshoot disfunctional systems, that's a call for action.
System Mgt computers need system mgt tools.
Xentry coverage fail to help MB support specialists.
Out Of Control!!
Joined: Apr 2019
Posts: 11,921
Likes: 6,769
From: Silicon Valley
W212 MY'14 M276-3.5NA @75kMi
Newbie
Joined: Mar 2025
Posts: 11
Likes: 1
I keep harassing them every couple of weeks.
Where are you located?
Newbie
Joined: Dec 2025
Posts: 8
Likes: 0
2021 GLC 63 S Amg Coupe
Im in Charlotte NC, I have been harassing them for the last 11 months. I have gotten free service when I needed new tires put on my car though. And I contacted MB Germany who reached out to MB USA and they contacted the dealership for me and also have given me extra shop credits for the inconvenience.
Newbie
Joined: Mar 2025
Posts: 11
Likes: 1
Im in Charlotte NC, I have been harassing them for the last 11 months. I have gotten free service when I needed new tires put on my car though. And I contacted MB Germany who reached out to MB USA and they contacted the dealership for me and also have given me extra shop credits for the inconvenience.
I got 2 prepaid service for free. The warranty left on it was 2 years star warranty, so they upgraded it to 2 years limited warranty and 1 year of star warranty.
I know that at the store level they are trying their best but it’s so inconvenient to deal with this and unfortunately they had to take the front end apart twice when they were trying different parts.
Is your triggering a P0128 code (active, pending and permanent) but vehicle is completely fine?
Newbie
Joined: Dec 2025
Posts: 8
Likes: 0
2021 GLC 63 S Amg Coupe
I am in Edmonton, AB.
I got 2 prepaid service for free. The warranty left on it was 2 years star warranty, so they upgraded it to 2 years limited warranty and 1 year of star warranty.
I know that at the store level they are trying their best but it’s so inconvenient to deal with this and unfortunately they had to take the front end apart twice when they were trying different parts.
Is your triggering a P0128 code (active, pending and permanent) but vehicle is completely fine?
I got 2 prepaid service for free. The warranty left on it was 2 years star warranty, so they upgraded it to 2 years limited warranty and 1 year of star warranty.
I know that at the store level they are trying their best but it’s so inconvenient to deal with this and unfortunately they had to take the front end apart twice when they were trying different parts.
Is your triggering a P0128 code (active, pending and permanent) but vehicle is completely fine?
Step 1 — Ask for a TAC / Engineering Case
Since this concern has been present long-term and no VIN-released software update is available, I am requesting that this case be escalated to Mercedes-Benz Technical Assistance (TAC) / Engineering for review.
The vehicle repeatedly sets P0128 despite no confirmed mechanical fault, and other owners with the same model/engine have documented the same condition while waiting for a calibration update.
Please open a TAC case and document the findings and guidance provided by engineering.
Dealers cannot ignore a TAC request once stated this way.
