2016 Mercedes C450 AMG 4Matic Transmission Problems
09-12-2016, 02:45 PM
#26
great info. having some of the same issues and mine only does it occasionally in sports + and at low speed, usually when i almost come to a stop and the start to accelerate the car again. Anyone think this is similar to all these other issues???
Thanks
Thanks
Last edited by Mxjet1; 09-12-2016 at 03:04 PM.
11-16-2016, 03:27 PM
#27
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2015 C63S
Took mine to the dealer, they told me today that since the other C450's they have do it that it's "Normal".
I told them because the other cars do it does not make it a "feature". It's a constant repeatable issue I was able to produce in their parking lot, consistently.
I'm preparing to call MB directly on this.
I told them because the other cars do it does not make it a "feature". It's a constant repeatable issue I was able to produce in their parking lot, consistently.
I'm preparing to call MB directly on this.
11-16-2016, 04:04 PM
#28
Took mine to the dealer, they told me today that since the other C450's they have do it that it's "Normal".
I told them because the other cars do it does not make it a "feature". It's a constant repeatable issue I was able to produce in their parking lot, consistently.
I'm preparing to call MB directly on this.
I told them because the other cars do it does not make it a "feature". It's a constant repeatable issue I was able to produce in their parking lot, consistently.
I'm preparing to call MB directly on this.
11-18-2016, 12:56 AM
#31
Super Member
Thread Starter
Hello everyone... So Mercedes-AMG found out what the problem was with my transmission. Yes, Mercedes-Benz could not figure it out since the C450 AMG transmission is modified by AMG for the dynamic drive and rear bios specs.
Anyways, Mercedes finally connected their data system to my car and it shows that the transmission was slipping in 2nd gear but no error code. Apparently this is normal as it allows the transmission to get ready for the 3rd gear. The only problem with my car is that it felt heavy when it slipped and now it's very light and most of time unnoticeable; which is the way the transmission is suppose to feel. Be aware that this slipping happens on all the gears but you may notice it in Comfort Mode and at slow take-off speed.
It came down to this problem: the transmission issue have been resolved by a replacement of the Transmission Clutch Solenoid which failed however the Mercedes diagnostic system did not register an error. Mercedes-AMG was sent my transmission data. It's a file of what the transmission is doing in code.
So the only group that was able to solve this matter was Mercedes-AMG in Germany.
Anyways, Mercedes finally connected their data system to my car and it shows that the transmission was slipping in 2nd gear but no error code. Apparently this is normal as it allows the transmission to get ready for the 3rd gear. The only problem with my car is that it felt heavy when it slipped and now it's very light and most of time unnoticeable; which is the way the transmission is suppose to feel. Be aware that this slipping happens on all the gears but you may notice it in Comfort Mode and at slow take-off speed.
It came down to this problem: the transmission issue have been resolved by a replacement of the Transmission Clutch Solenoid which failed however the Mercedes diagnostic system did not register an error. Mercedes-AMG was sent my transmission data. It's a file of what the transmission is doing in code.
So the only group that was able to solve this matter was Mercedes-AMG in Germany.
11-18-2016, 01:21 AM
#32
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2014 E63S; AMS 100 octane ecu tune; edok tcu tune; BB intakes; dyno tuned
Hello everyone... So Mercedes-AMG found out what the problem was with my transmission. Yes, Mercedes-Benz could not figure it out since the C450 AMG transmission is modified by AMG for the dynamic drive and rear bios specs.
Anyways, Mercedes finally connected their data system to my car and it shows that the transmission was slipping in 2nd gear but no error code. Apparently this is normal as it allows the transmission to get ready for the 3rd gear. The only problem with my car is that it felt heavy when it slipped and now it's very light and most of time unnoticeable; which is the way the transmission is suppose to feel. Be aware that this slipping happens on all the gears but you may notice it in Comfort Mode and at slow take-off speed.
It came down to this problem: the transmission issue have been resolved by a replacement of the Transmission Clutch Solenoid which failed however the Mercedes diagnostic system did not register an error. Mercedes-AMG was sent my transmission data. It's a file of what the transmission is doing in code.
So the only group that was able to solve this matter was Mercedes-AMG in Germany.
Anyways, Mercedes finally connected their data system to my car and it shows that the transmission was slipping in 2nd gear but no error code. Apparently this is normal as it allows the transmission to get ready for the 3rd gear. The only problem with my car is that it felt heavy when it slipped and now it's very light and most of time unnoticeable; which is the way the transmission is suppose to feel. Be aware that this slipping happens on all the gears but you may notice it in Comfort Mode and at slow take-off speed.
It came down to this problem: the transmission issue have been resolved by a replacement of the Transmission Clutch Solenoid which failed however the Mercedes diagnostic system did not register an error. Mercedes-AMG was sent my transmission data. It's a file of what the transmission is doing in code.
So the only group that was able to solve this matter was Mercedes-AMG in Germany.
11-21-2016, 08:52 PM
#33
GLE 350 here, I have the same issues. The transmission is very clunky, not responsive, attempts to search for entirely too long. X5, S5, MDX do not have any of these problems and they are in the same price range. I've taken it to the dealer 3-4 times and reset the ECU myself. They tell me "theres nothing wrong" but the head mechanic actually admitted Mercedes thinks there's an issue between the transmission and engine computers talking to each other. There are quite a few people having this issue too. Our 2000 E320 runs like a dream compared to my GLE.
11-21-2016, 09:06 PM
#34
Hello everyone... So Mercedes-AMG found out what the problem was with my transmission. Yes, Mercedes-Benz could not figure it out since the C450 AMG transmission is modified by AMG for the dynamic drive and rear bios specs.
Anyways, Mercedes finally connected their data system to my car and it shows that the transmission was slipping in 2nd gear but no error code. Apparently this is normal as it allows the transmission to get ready for the 3rd gear. The only problem with my car is that it felt heavy when it slipped and now it's very light and most of time unnoticeable; which is the way the transmission is suppose to feel. Be aware that this slipping happens on all the gears but you may notice it in Comfort Mode and at slow take-off speed.
It came down to this problem: the transmission issue have been resolved by a replacement of the Transmission Clutch Solenoid which failed however the Mercedes diagnostic system did not register an error. Mercedes-AMG was sent my transmission data. It's a file of what the transmission is doing in code.
So the only group that was able to solve this matter was Mercedes-AMG in Germany.
Anyways, Mercedes finally connected their data system to my car and it shows that the transmission was slipping in 2nd gear but no error code. Apparently this is normal as it allows the transmission to get ready for the 3rd gear. The only problem with my car is that it felt heavy when it slipped and now it's very light and most of time unnoticeable; which is the way the transmission is suppose to feel. Be aware that this slipping happens on all the gears but you may notice it in Comfort Mode and at slow take-off speed.
It came down to this problem: the transmission issue have been resolved by a replacement of the Transmission Clutch Solenoid which failed however the Mercedes diagnostic system did not register an error. Mercedes-AMG was sent my transmission data. It's a file of what the transmission is doing in code.
So the only group that was able to solve this matter was Mercedes-AMG in Germany.
Do you have any written documentation of this? I don't trust my dealer anymore (they told me excess road noise from my sunroof after using vent mode is "normal", it's not at least it should not be) and would like to take this to the dealer across town to see what they have to say about the transmission issue
01-17-2017, 09:33 AM
#35
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2015 C63S
Anyone who is having issues with the transmission shifting oddly/slipping please call MB Customer Service and report it. I've started the ball rolling but they claim there have been little/no reports of any other issues. I've escalated this as high as I can to the "Market Engineer" (I believe they called him/her?) and they say it's software related. Due to the lack of complaints it isn't a high priority to send out an update.
Thanks,
Thanks,
01-17-2017, 09:37 AM
#36
In my experience, it is cured by software. Pm me your email address and I'll refer you to a guy who may help. Basically, a ptss case is begun, a technical specialist in Germany considers the symptoms you report and writes a patch and then an adaptive reset is done locally while driving the car!
Don't let them BS you, it is common enough that mercedes Germany knows how to fix it.
Don't let them BS you, it is common enough that mercedes Germany knows how to fix it.
01-17-2017, 10:30 AM
#37
Thanks for your pm. As I understand it, the resolution has two parts, each of which is essential: a software patch prepared in and forwarded from Germany, then "tuned" to your car by driving with an external computer in place so that the local tech can see how the patch reacts to real conditions and modify it as required. I suggest your service manager has yet to find the right guy in Germany.
01-21-2017, 04:52 AM
#38
I just purchased a C250 a few weeks back. Only 1 week ago at 1500 KMs I started feeling a slightly sluggish transmission between D2 & D3. This is not constant and sometimes it doesn't exist at all (I believe depending on the temperature). My car has a 7G transmission.
So since I bought the car from a different city than the one I live in. I called the service center to see what they have to say. The service adviser informed me that this is normal and if there's a problem with my transmission I will see an error message.
My problem is really mild and doesn't seem as bad as others are describing. It only happens in comfort. What do you guys advise me to do ?
So since I bought the car from a different city than the one I live in. I called the service center to see what they have to say. The service adviser informed me that this is normal and if there's a problem with my transmission I will see an error message.
My problem is really mild and doesn't seem as bad as others are describing. It only happens in comfort. What do you guys advise me to do ?
04-01-2017, 12:12 PM
#40
Member
I just purchased a C450 a few weeks ago with 9k miles on it. In the 2 weeks I've had the car I've noticed this too. It has happened 2 times.. seems like at random. Both times it was in Sport+ mode and I was at a stop (in a parking lot or side street). As soon as I started to accelerate it would jerk for 2-3 seconds, eventually becoming smooth again. I thought I was losing my mind the first time it happened but then it happened again today and I knew it must be something quirky going on. It's also awkward because other people see you jerking the car like you don't know how to drive it or something...
So.. just wondering if there truly is a fix. If i tell the MB dealership about it, will they know what I'm talking about and know what to fix? They might just say 'everything looks normal'. Anything special I should tell them?
Thanks.
So.. just wondering if there truly is a fix. If i tell the MB dealership about it, will they know what I'm talking about and know what to fix? They might just say 'everything looks normal'. Anything special I should tell them?
Thanks.
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04-01-2017, 12:33 PM
#42
Member
I just found this thread https://mbworld.org/forums/c-class-w...plus-mode.html which is more my problem than this thread.. I think. Mine is jerky is Sports+ whereas this OP I believe has slight slippage in Comfort.
A couple posts in the other thread say it is normal in Sport+ since it is a sport tuned transmission....
A couple posts in the other thread say it is normal in Sport+ since it is a sport tuned transmission....
04-01-2017, 02:03 PM
#43
Super Member
Thread Starter
Hello Everyone,
it would seem that Mercedes is aware of the problem since someone posted a video on YouTube advising the first steps to correct the issue. More than just a part change or software update.
https://youtu.be/0haHOcgujtY
it would seem that Mercedes is aware of the problem since someone posted a video on YouTube advising the first steps to correct the issue. More than just a part change or software update.
https://youtu.be/0haHOcgujtY
04-01-2017, 02:23 PM
#44
Didn't you go to Thornhill?
What did they do?
MB has a service bulletin which cautions against parts replacement, so....
What did they do?
MB has a service bulletin which cautions against parts replacement, so....
Last edited by removedCFGaccount; 04-01-2017 at 02:41 PM.
04-01-2017, 07:17 PM
#46
MBWorld Fanatic!
Well, got my C450 AMG back.. Funny...still the same problem. I'm pissed as my in-car camera caught the mechanics speeding all over the place. Guy gets into my car and states "oh, the car has over 360hp". What? MB Mechanic does not know how the C450 is built? He takes my vehicle up to 115km on Hwy 7, then slams on the breaks at one point so the red light camera would not catch him. He then speeds through traffic, zooming in and out. I told them my transmission slips in 2nd gear. How does he expect to see what is going on when he is racing around the streets. So now, they are coming to bring me a loaner again and this time I need to sit down with the foreman and walk him through the issue. They drove my car around 2x, had the hood up, washed the car and told me it was okay. Poor service since I have bought this vehicle and it's only getting worse. I have had better service while owning a Mazda than a Benz and this should not be. What upsets me the most is that my car had not even reach the break-in point and this guy was racing my vehicle when I never did that since I bought it. Yeah, you know I'm not going to stop there as I have LIVE footage of his abuse to my vehicle.
Also, there is no break in period for non AMG cars. They break in the motors on a stand before they install them into the cars. So you can rip it up to redline on mile 1
04-01-2017, 09:32 PM
#47
MBWorld Fanatic!
I was on a forum once for performance cars. A guy was pissed because when he got his car back from a service visit the fuel was down a quarter tank and there were fresh rubber shavings in the rear wheel wells. Some guys were telling him to lighten up...the car was built for burn outs after all.
But one guy made a great point. He said your wife's vagina is built for sex. So is it okay if her gynecologist screws her at her next exam?
Bottom line, I can tear the car up if I choose. The shop cannot.
But one guy made a great point. He said your wife's vagina is built for sex. So is it okay if her gynecologist screws her at her next exam?
Bottom line, I can tear the car up if I choose. The shop cannot.
12-13-2019, 06:44 PM
#48
My car is now having the same issue as OP, except it does it independent of temperature. Also have a 2016 c450
First experienced this 11/28, had a service apptment on 12/11. Dealer updated some engine control module(will update when I can check the paperwork). Car is better, the skipping in 2nd is less frequent and more mild when it does happen, however the problem has definitely not been resolved. I'm still getting rpm drops in 2nd with no gear change occuring. Will reply with what worked for me if they can fix it.
First experienced this 11/28, had a service apptment on 12/11. Dealer updated some engine control module(will update when I can check the paperwork). Car is better, the skipping in 2nd is less frequent and more mild when it does happen, however the problem has definitely not been resolved. I'm still getting rpm drops in 2nd with no gear change occuring. Will reply with what worked for me if they can fix it.
07-23-2020, 10:17 PM
#49
Member
How common are these issues? Have a deposit on a C450 out of warranty but I have a 7 day return so I will be on the lookout for potential issues during that 7 days.
07-24-2020, 12:05 AM
#50
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DrivingForce (07-24-2020)
