BenzWorld Junior Member
Date registered: Aug 2013
Vehicle: Mercedes Benz
Location: PA USA
Mentioned: 0 Post(s)
Quoted: 0 Post(s)
2001 E320 SW 35,000 miles with CEL problem
I recently bought this car from a friend in FL , car was garage kept and not used much or often. Check engine light was on. I drove the car to PA without problem or incident. I have used only premium(93 octane) fuel in the car since I bought it. Not sure whether previous owner did.
Trying to pass PA state inspection the emission test showed error codes 0170 and 0173. My mechanic replaced the air filter, the fuel filter and eventually the MAF (mass airflow sensor). CEL went off and then came back on after driving about 20 miles, tried resetting it twice but it came back on .
I then disconnected and re connected the battery, CEL went off and then came back on again at 20 or so miles.
After doing the battery deed I had an incident of a foul rotten egg smell in the car on restart and I experienced a lack of power when accelerating. The problem passed pretty quickly and the car ran smoothly again. The smell returned one more time at restart the same day, worse than before, but has not re-occurred since. If the odor problem presents again I have learned from this forum that it's probably an ignition coil(s).
Does anyone have any suggestions.? My mechanic thinks it's a computer problem. Is it?
Thanks for any ideas.