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Rashy - curious if you wound up utilizing this warranty extension? It seems my recent 2015 E63S with 57k miles is also throwing Cyl 5 misfire code, and a recent limp mode too! Great first month of ownership :/
I cleared codes both times, got car home safely and did the coil pack/plug swap in hopes of resolution. Will watch over next few weeks, but I imagine the hive mind would suggest leaving the code(s) next time and having car towed directly to dealer? ANY tips for best playing this game most appreciated
Next time your vehicle goes into limp mode and throws a cylinder 5 misfire code, I would get it to the dealer and insist that they do a compression and leak down test on cylinder five. This is the easiest and fastest way to diagnose the problem. They will probably suggest replacing the coil pack and injector before doing a compression and leak down test. Most likely this will not fix the problem and it will be a waste of your money and time. If the dealer will not do it, find a good independent MB shop and ask them if they have dealt with this problem and resolved it with the dealer.
My ML is going under the knife tomorrow. Friday i had code P030085. Leakdown on cylinder 5 was 70%. only had time after work to do 1,5,8. Full leakdown & compression testing will come tomorrow. This will be the 3rd cylinder head my ML has gotten... first @ 25k, 2nd @ 59k and now possbile a 3rd @ 112k.
I'll let you guys know the diag outcome evening most likely.
My ML is going under the knife tomorrow. Friday i had code P030085. Leakdown on cylinder 5 was 70%. only had time after work to do 1,5,8. Full leakdown & compression testing will come tomorrow. This will be the 3rd cylinder head my ML has gotten... first @ 25k, 2nd @ 59k and now possbile a 3rd @ 112k.
I'll let you guys know the diag outcome evening most likely.
Did you perform the initial leak down testing on 1,5,8? I just got a set of the testing gauges and aim to perform shortly. I’m curious if you utilized your own test results to somehow ‘prove’ or motivate the dealer to perform full testing etc…?
My ML is going under the knife tomorrow. Friday i had code P030085. Leakdown on cylinder 5 was 70%. only had time after work to do 1,5,8. Full leakdown & compression testing will come tomorrow. This will be the 3rd cylinder head my ML has gotten... first @ 25k, 2nd @ 59k and now possbile a 3rd @ 112k.
I'll let you guys know the diag outcome evening most likely.
It's hard to believe the head is the issue at this point and mileage. I'd say a second failed test points to a deeper issue, maybe the block is not completely flush? I remember reading some loosely documented issue with assembly defect regarding specifically cyl #5 on the M157. No specific date or production run that was memorable.
The tech happens to be my brother, he wanted to just check those cylinders that night before the shop closed up. Working at a dealership comes with some pros. When the SDS had code P030085 he had a feeling it was the head. When he writes all his diag notes & numbers down, ill pass those along.
The tech happens to be my brother, he wanted to just check those cylinders that night before the shop closed up. Working at a dealership comes with some pros. When the SDS had code P030085 he had a feeling it was the head. When he writes all his diag notes & numbers down, ill pass those along.
Would love a follow-up if you and your brother get a chance to share any further details? Thanks!
He'll start the job on Monday. Doing a few extra parts while the engine is out such as turbo lines, thermostat, pulleys & tenshioner, belt, motor mounts & trans.
Might add a water pump on top of it all. But my GLC loaner is just not cutting it.
@C43 Fun Haver I think I now wish I lived in Baltimore lol. Thank you for the data points and pics! I’m about to do my leak down testing now, not sure what outcome to hope for at this point lol
@C43 Fun Haver I think I now wish I lived in Baltimore lol. Thank you for the data points and pics! I’m about to do my leak down testing now, not sure what outcome to hope for at this point lol
Oh no. Very similar results
Send me your vin # and ill check to see if your vehicle has the extended coverage on the valves. The warranty is based on sell month of the vehicle, mine would be the end of March 2025 being a model year 2015, rr mileage up to 120,000k.
hopefully its not a canada based vehicle.
My vin# is WDDHF7GB0FB139582. It’s a 2015 E63S sedan, shows manufacture date of 12/14 per door sticker. It has 58k miles, US origin. I am thinking/HOPING it qualifies, however I think it may expire in December…?
hopefully this attached your VMI. Looks like you do have the coverage so I'd set up an appt with a dealership you have some connection with or not. Talk with the service advisor regarding your results. Dealership will have to redo the testing to verify but i'm not sure what they will charge. This warranty doesn't exactly cover everything. I had to pay for intake valves since Mercedes will not.
I think Code P030085 needs to be present as a fault. (combustion misfiring is present on mutliple cylinders)
You also have an open service campaign for ECU update Emission Service Campaign 2022080005 Launch Notification Perform Engine Control Unit Software Update
Last edited by C43 Fun Haver; Oct 15, 2024 at 10:40 AM.
Thanks again! Good to know I have until Feb ‘25…I don’t have the codes active since I cleared them last occurrence before learning of the extended warranty.
Bummer re intake valve costing, thought that was covered. Still, significant coverage to resolve a 70% leaky cylinder is something. Of course it’s sad that it occurs at all in a 60k mi motor from a $100k+ vehicle.
Couldn't have said it any better. I dont believe Mercedes has changed the part numbers on these heads so this issue will not be going anywhere.
If this was a customer pay job, I think it would be best to take the heads to a machine shop and see if upgraded valve seats can be done.
yeah I tried to argue with my Warranty Admin that I shouldn't have to pay for intake valves but i didn't get very far with her lol.
Hopefully you can get those codes to pop back up & crossing my fingas that it all goes well before you run out of Warranty
Reviewed the warranty doc again, as I thought for sure I saw Intake valve coverage. It seems I did, but maybe only the labor portion is covered?! That makes zero sense to me, but I see it under damage codes but not parts codes. I wonder if @TECHNICIAN might chime in, or any others that have directly worked for MB dealerships
He'll start the job on Monday. Doing a few extra parts while the engine is out such as turbo lines, thermostat, pulleys & tenshioner, belt, motor mounts & trans.
Might add a water pump on top of it all. But my GLC loaner is just not cutting it.
Back on the road and all running well for you? Hope so! I have yet to throw another code, which most would consider a good thing I suppose…but the clock is ticking
She's back on the road! It was finished Monday morning-ish after a battle with some coolant lines popping off during road tests. We let it sit at work for one more night & took it home Tuesday. I've got about 150 miles on it, doing a 1,000 mile break in for the new parts with an oil change then.
Keeping an eye on one of the hydraulic lines for a small leak.
Mercedes did pay my claim on my car within like 24 hours lol, so I took my old cylinder head home and might clean it up..
Warranty paid my brother i think 39.5 hours so he was stoked about that. Took 41 hours & that's with the accessory work he did.
hello all, yesterday cylinder 7 on my 2015 ml63 with 104k miles started misfiring with p030785 fault code. this seems inline with issues mentioned in this thread. i plan to contact dealership and have them diagnose issue.
question: once issue is fixed, how likely is this to recur on a different cylinder?
Hello. I am new here and I wanted to reach out to the community about my problem. About 7 months ago I purchased a used 18 GLS 63 without a warranty and just now i experienced a misfire and I learned from the dealer that Cylinder 5 has low compression and needs a 20k dollar repair. Any recommendations?
Sorry to hear about that. If you are willing to post your vin number or PM me. We can check the VMI to see if the M157 MBUSA extension applies to your vehicle. Depeding on mileage & sales date. Is the vehicle at a dealership or a repair shop? Bringing the vehicle to a different shop if you're not confident with their recommendations. In order to have the job covered under warranty I believe a certain set of codes must be present in the quick test with the techs.
Matt, Thank you for getting back to me. any help or support is greatly appreciated. This is beyond devastating for me. This was my dream car.
I took it to MB dealer and they did a Xentry compression test that shows cylinder 5 low compression. I will PM you my VIN
Hello. I am new here and I wanted to reach out to the community about my problem. About 7 months ago I purchased a used 18 GLS 63 without a warranty and just now i experienced a misfire and I learned from the dealer that Cylinder 5 has low compression and needs a 20k dollar repair. Any recommendations?
Sorry to hear.
What was the diagnosis for low compression on cylinder 5? What does the 20k repair bill fix?
Matt, Thank you for getting back to me. any help or support is greatly appreciated. This is beyond devastating for me. This was my dream car.
I took it to MB dealer and they did a Xentry compression test that shows cylinder 5 low compression. I will PM you my VIN
I’m not sure how they did a compression test digitally because for AMG engine engines xentry says digital compression test is not available and to do the test manually….. did they provide you a printout of the diagnostics?
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