Signal light switch replacement

2003 MERCEDES BENZ C240

90,000 MILES • 2.6L • 6 CYL • RWD • AUTOMATIC

SANNYSKYSR

MEMBER
5 POSTS

I watched your video in youtube.com about replacing signal light switch on C-class models. Since the battery has been disconnected, may I know if there were any issues like error codes or malfunctions that may have came out after reconnecting the battery. I hear a lot that once the battery is disconnected and reconnected, there are errors and malfunctions that come out. Please enlighten me. Thanks

Jan 14, 2016 at 7:56 AM

WRENCHTECH

✓Experienced Mechanic
20,760 POSTS

Yes, there are a number of things that trigger when the battery is disconnected. All your windows will likely have to be re-initialized. The sunroof also if equipped. Any personalized settings like seats and radio will be lost and the engine and transmission will have to relearn their adaptive strategies.

Jan 14, 2016 at 8:56 AM

SANNYSKYSR

MEMBER
5 POSTS

Thanks for your reply. When you say " the engine and transmission will have to relearn their adaptive strategies", will it affect the performance seriously? How long will be the adaptive period? Is there no way that the SAM be affected as others say? Thanks

Jan 14, 2016 at 9:04 AM

WRENCHTECH

✓Experienced Mechanic
20,760 POSTS

You probably won't even notice the relearning. It has more than one SAM but they shouldn't be effected.

Jan 14, 2016 at 9:07 AM

SANNYSKYSR

MEMBER
5 POSTS

Okay, thank you very much for your help. I will do my experiment tomorrow. I will let you know the outcome. Thanks again.

Jan 14, 2016 at 9:10 AM

SANNYSKYSR

MEMBER
5 POSTS

I was about to start the project (signal light switch) but something came into my mind. I was thinking that I might lose the radio and I don't know the activation code if in case it requires me to activate the radio. Any help please. Thanks

Jan 15, 2016 at 5:33 AM

WRENCHTECH