My 580 is back in the shop, once again with an illuminated engine light. I pulled the codes myself this time, prior to taking the car to the dealer, and I received cylinder misfires on one and six. Don’t know for sure, but I hope this repair solves the vibration issue. Also, I did note that the oil level was barely above the minimum level at only 5k miles. I know German autos tend to consume oil, but this is worse than anything I’ve experienced, including my Porsches, which can be pretty thirsty.

Per the previous comments, my SA did acknowledge that part of the repair will include a software update, which was odd considering a tech had not looked at my 580 when he conveyed this info. I will report back once the repair is completed.

 

Please refresh my memory...
DId cylinder deactivation caused the misfire? Or was this already discussed in the thread and ruled out?

 

Unsure. This is the first time my 580 has thrown these codes, and I don’t recall a discussion in this thread regarding cylinder deactivation causing misfires. When my 580 is repaired, I’ll report back with the dealer’s findings.

 

​​​I see, hope it all goes well.

 

Update: Picked up the truck this afternoon with the following work completed:

Chasing the cylinder misfire issue, the dealer conducted an exhaust smoke test, checked all ground wires, inspected the turbos, and checked for leaks. All results were negative. Shop foreman mentioned there was a software update that would change the fuel rail pressure parameters, which he suspected was the culprit in the misfire problem. Software was updated and problem seems to have abated. Granted, I have only driven 20-25 miles since the repair but the shaking/vibration at idle seems to be gone, and the truck does seem to be running much more smoothly. I’ll need to put more miles on it in order to be sure, and I’ll report back with findings later.

Also, two other interesting items from the service visit. First, I noted when I dropped the car off Monday that the oil level was already at the minimum, according to the off-road menu gauge (this is a new 580 with only 5k miles). According to the shop foreman, the software update also recalibrated the oil sensor, and the off-road oil gauge is now reading exactly at the midpoint with zero oil added. Not sure what to make of this but it’s conceivable the software update introduced a myriad of changes to multiple systems.

Secondly, I asked my SA to have the tech check the brakes, which were squealing loudly at low speed braking. To my surprise, the shop installed brand new rotors, pads, and sensors on the front end. This seemed overly generous and a bit of an overreach for a simple complaint about brake squeal. When I pressed for a mechanical explanation, the response was fuzzy. I can’t be sure but it would seem MB knows of an issue but doesn’t want to widely advertise it or file an official recall, so they are handling on a case by case basis. I was genuinely shocked but pleasantly surprised. As I’ve stated previously, the service shop at my dealer is exceptional.

 

Looks like you got a good dealership, glad everything is working well now. The brakes might have a wear and tear period of 12 months so they can claim warranty, but at least they didn't throw the "it's normal" or "cannot duplicate" card.

 

If I recall correctly, I think my SA stated that they had a six month grace period from MBUSA for the brakes. I was definitely expecting the “it’s normal” response to my concern but the “cannot duplicate” would have been tough considering the noise coming from the brakes when I pulled into the service bay.

 

They might have changed it to 6? It actually says 24 months and not the 12 months as what I thought of: https://www.mercedes-benz.ca/content...Book_Final.pdf

 

Thanks for providing the link; that’s great info! I would trust your official MB documentation vs. a vague comment from an SA.

 

You're welcome, just not sure if they changed it for 2025 model year vehicles, I wasn't able to locate the most updated one.

 

For example, in the past, Mercedes connected services trial period with a new vehicle was 3 years, now it is down to only 1 year.