Why is it still running or idling rough

2005 MERCEDES BENZ E320
55,000 MILES
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IAMSAL4710
  • MEMBER
  • 1 POST
Have replaced spark plugs and front O2 sensors
Nov 28, 2011 at 5:06 PM
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BMRFIXIT
  • ✓ASE Certified Mechanic
  • 19,053 POSTS
  • ASE Certified Mechanic
what do you have for codes?

check for vacuum leaks
check air filter and MAF sensor
Nov 28, 2011 at 5:24 PM
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