KirstenSpeedster
Problems with smoking and juddering Mercedes ML Diesel 20 - causes and solutions?
Strong exhaust smell
Black smoke from exhaust on acceleration
Longer cold start time
Jerking on acceleration
Poor fuel economy
Check engine light on
Loss of engine power
(Translated from German)
4 comment(s)
Sure, no problem! With your mileage, it could well be that certain parts are starting to show their limits. If you had an inspection about 40k miles ago and no problems were found, there could be something in between. Is your fuel consumption above the normal range? If so, then it really seems like there is a problem with the mixture formation. A fouled lambda sensor could also greatly affect the mixture formation and therefore fuel consumption and cause black smoke. So, if the fuel pressure regulator is OK, please have the lambda sensor checked as well. Sometimes the problem is not just one broken part, but a combination of several small problems. Good luck with the troubleshooting and let us know what the mechanics find!
(Translated from German)
Hey, thanks for the further advice. I'll tell them about the lambda sensor too. Unfortunately, my consumption is really above the normal range. I just hope that the repair won't be too expensive. I'll keep you posted as soon as I find out anything new. Thanks again for your help!
(Translated from German)
Let our mechanics help you!
Hi, I'm not a car professional either, but I do have some experience with cars. I had a similar problem with my Mercedes GLK Diesel, model 2012, so it may be the same problem. In my case, the fuel pressure regulator was broken and needed replacing. I went to my garage and described the symptoms. They then carried out a diagnosis and found that the fuel pressure regulator was the culprit. The replacement cost me about 2 euros. Can you please give me more details about your car? Maybe then I can help you better. Vehicle details such as mileage and last service could be helpful. I hope that helps you for now.
(Translated from German)