Hi my (old but trusted)MB 190E 2.6 failed it's emission test. Anyone have any ideas what the trouble might be? Could it be the O2 sensor? EGR valve? Vacuum leak? What should I look for...is this a common problem? Please help. Thanks in advance!!

I work with a guy who said that his 450 sel failed emissions testing because he wasn't using exactly the correct spark plugs for it

Pep boys has um. Thats what I did on our old Minivan. Gets me an extra 2 years to worry about emissions.

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Chirag (Charlie) Patel
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- 03 Mercedes S600 Sport TTV12
- 97 Acura NSX-T
- 99 BMW E36 M3 w/500+ HP
- 04 Lexus RX330
- 04 Dodge Dakota Quad 4x4 V8

4 Sale:
- 99 BMW M3 E36 Coup with Dinan SC, Upgraded to an RMS Stage 3 with Aftercooler, 12psi, and 500+hp @ flywheel.

It would help to know the general condition of the car, the milage, when the o2 sensor was ever changed (60K generally), the condition of the spark plugs (wet?) and if you've notice a decrease in mpg?