My mechanic is concerned my 1995 320e mercedes wagon may not pass smog.... what should be my concerns?

Tamisha Cowan

Asked by Feb 07, 2015 at 12:12 PM about the 1995 Mercedes-Benz E-Class E320 Wagon

Question type: Maintenance & Repair

I was having major wiring issues with my
1995 320e mercedes wagon and replaced
the wireharness, air Intake sensor, mass
airflow sensor, spark plugs, spark plug
wires, coils,  oil change, air filter, oil filter,
fuel pump, fuel filter, battery, fuel pump
relay...  I have a small hole in my exhaust
pipe.... other than that what should I
prepare myself for incase it doesn't pass
smog. My catalytic converter should be
fine.... anything I should be prepared for.

2 Answers


Sounds like you have it covered. I'd check the EGR valve to make sure the vacuum line is in good shape. My Dodge barely failed a roadside check of the 2500 RPM NOX because the 23 year old micro vacuum line to my EGR rotted. You can also check the general efficiency of the cat with an infrared thermometer. Lot of info on the web on how. Good luck.

Tamisha Cowan

Thank you so much. I forgot about the egr valve. I will let you know how it goes.

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