I went to two MB dealers and the last one told me they wanted $1,500 to 'troubleshoot' the problem with my E350 engine and then we would know how much more it might cost. Ridiculous! I then went to European Auto Care....these guys are awesome!! Not only did they promptly diagnose the issue, they quoted me the repair cost, which was extremely fair, and did the work promptly and it completely resolved my issues. My car now runs like it is factory new again. It's a real find to know that these guys are MASTER MECHANICS at their craft. I waited a few months to file this recommendation so that I can truly report that the results seem to be good for the long term. They have earned all of my German Car maintenance business from now on. Thanks so much for your Team, Imi. -Clint