I don't think your car has the CIS/E mixture adjustment screw, pretty sure the M104 is all electronic fuel injection (motronic?). As a side note, even if you had this adjustment screw, you should not fiddle with it unless you have a CO meter and know what you are doing. The reason being is that the system gets feedback from the oxygen sensor and if you manually adjust the mixture it will put the system out of balance. The result being that you could damage your engine. Far as your emission problems go, there are a number of things that can cause this, from a dirty air filter to a stuffed catalytic converter. I would focus on your oxygen sensor first and make sure it is working properly. As the O2 sensor ages it will make the system run richer and thus spew out more CO. Unfortunately this sort of thing is hard to diagnose by a home mechanic due to the tools required to diagnose the system properly.
Robb Taglieri wrote: > I have a '93 300E 2.8 that has failed emissions. While I was at emissions > testing I ran into a person who has a 88 300E that also failed. He was told > by his mechanic that there is a 3mm allen screw in the center of the top of > the air intake that if you turn it backwards it will lean the mixture. When > tested it actually did lower the HC's count. I am wondering if there is such > an adjustment and where it would be on the '93 I have. > > Robb > 93 300E, 89 300 SEL, 81 300D, 85 380SL > > _______________________________________ http://www.okiebenz.com For new parts see official list sponsor: http://www.buymbparts.com/ For used parts email [EMAIL PROTECTED] To Unsubscribe or change delivery options go to: http://okiebenz.com/mailman/listinfo/mercedes_okiebenz.com
