Engine Performance problem
1999 Mercedes Benz 320e 6 cyl All Wheel Drive Automatic 90,000 miles
1. Took the car in for emissions and it failed with codes:
P0170 Fuel Trim Bank 1 & P0173 Fuel Trim Bank 2.
What do these codes mean (if it the Oxygen sensor the car has 4). Also sometimes the has been mis-firing.
2. At what mileage do you recommend replacing the transmission fluid and filter, as it is a sealed system.
Thursday, April 22nd, 2010 AT 8:23 AM