Bakhti Jon

Hey guys , I'm new to the forum and figure ask MB owners about few issues I have .
I own MB c230 kompressor 2005 , I love my car , drives beautiful and smooth , no problem till yesterday , my engine light came in , I went to autozone and checked , shows code# p0171 and p0620 . Any advise would help thanks !!!

Richard Baez

My 2004 c230 komp has the same issues P0171 could be a vacuum leak and the P0620 could be related to the Alternator. I will find out in a few more days once I take my C230 to Mercedes of Friday.

Richard Baez

Finally after so many years of having this check engine light on due to a recalled back in 2008 for the 3 vacuum hoses as follow part# 271-018-14-82 & part# 271-018-15-82 bleed hose, part# 271-018-03-29 valve & part# 271-018-12-05. If you're having the same problems than get a smoke test done to determine the leaks. My leak was due to the hose above the supercharger in which it was never replaced from recall but instead attempted & my guess is that mechanic gave up on the job since my check engine light didn't go into the shop ON but he did acted like he corrected the recall and possibly did try to pull the hose off in which he damaged it causing it to give me a vac leak after my visit for the recall. There was no way to verify it because i never had the time to do it myself but I did let the dealership know about it and they simply kept on charging me for it & never corrected the issue for over 8 years. Each time I would bring it for a yearly inspection I would let them know and it was crazy that it would go off than come back on after the inspection pass.