smog emissions failed due to catalyst and evaporation

2004 MERCEDES BENZ 350SL
120 MILES
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VONRAD1
  • MEMBER
  • 1 POST
have 2004 ml350 passed smog emissions, failed due to catalyst and evaporation show "imcomplete" Replaced battery 7/11, have driven many miles. OBD still not resetting. Cert Mercedese mech tells me to continue to drive. any suggestions. codes are:evap & cat
Dec 20, 2011 at 9:39 PM
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BMRFIXIT
  • ✓ASE Certified Mechanic
  • 19,053 POSTS
  • ASE Certified Mechanic
if no scan tool
to check what is happening
you have to keep on driving it until ready or set a code
long ride on the free way may help
Dec 20, 2011 at 9:58 PM
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