SL55 Failed smog
Thread Starter
Member
Joined: Feb 2007
Posts: 156
Likes: 1
From: El Dorado Hills, California
2004 SL55 AMG EUROCHARGED. 2002 X5. 1999 SUBURBAN WHIPPLE SUPERCHARGER+MODs,04 M3 EUROCHARED
SL55 Failed smog
Hello. I have 04 SL55 failed smog it says MIL/Check Engine Light but I do not have any check engine lights on the car. few days bdfore the smog test it briefly showed battery warning light visit workshop right after i started car but it went away when i drive the car. I have changed consumer battery few month ago and never had the warning lights. I did the OBDII chcek and it does not have any code present. eha t might be wrong any ideas.
Thanks
Thanks
Thread Starter
Member
Joined: Feb 2007
Posts: 156
Likes: 1
From: El Dorado Hills, California
2004 SL55 AMG EUROCHARGED. 2002 X5. 1999 SUBURBAN WHIPPLE SUPERCHARGER+MODs,04 M3 EUROCHARED
Just Brabus exhaust and resonator delete and Eurocharged tune which was done few years ago
Senior Member
Joined: Jul 2011
Posts: 386
Likes: 13
Cl65 AMG
In some stated the tech will plug in the diag connector under the dash. That will look at emission tests flags. If your battery dipped low or some other quirky thing happened to the computers voltage supply the flags would reset to something like a testing mode. Some cars need to be driven a lot to get all flags to pass internal tests. HST, if you have a issue that sets the light and just cleared it before the smog test it will fail for the above reason as well, or just disconnecting the battery will cause the car to fail ALL THOSE REASONE STATED ABOVE WITHOUT THE CHECK ENGINE LIGHT BEING ON IN THE DASH..
