Check engine light 2005 e55 amg
LarryV1000
This I know is SOP when you go Kleemann and remove the cats.
They are aware that the CEL will appear because of cats removed.
More than likely the cause.




LarryV1000
Ok did you have the resonators removed or the cats? You mentioned resonators but Ken mentioned cats. If its the resonators you should not get a CEL. You may have an exhaust leak or vacuum pump error or something that has to do with air intake but it should be a easy fix. If you had the cats removed the pre cats are the only ones that will cause a CEL and you will need to override the software as Ken mentioned. Post cats should not cause a cel.



