I found out it is in the computer. Don't know exactly how it works or what it does. Probably fuel air mixture. Don't get me wrong, I love Mercedes cars but they will tell you NOTHING about them. All Mercedes says is ask the dealer or take it to the dealer. When you take it to a dealer you are talking to some service advisor that does not work on them and cannot answer your questions. No books or manuals telling about the 140 cars. This is totally pathetic. There are some of us out here that likes to work on our own cars and have the mechanical ability to do so if we only had some type of manual or guide. Mercedes SUCKS in this area!

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1995 S-350
370K + SOLD
1952 220B Cabriolet
39K kilometers + SOLD
1998 E300D
310K +
2012 E350 BlueTec
120K