MercFiveHundred

Every morning when it's below 35 degrees, I start my car and i get the SRS malfunction light and message. I drive like that to work and then when I leave work, I start it up and its on again but the error goes away after a minute.

What would cause this to occur? Bad battery? I'm thinking it has to do with the outside temperature and the battery losing power when it's at freezing.

drrsb50

did you ever find out what caused this??? my is doing same.

daddcap

I am interested as well, my 2003 E500 is doing this too.

Taylor-Made'90

When this started happening to me 1.5yr ago, I stopped getting the SRS message after the aux battery was replaced....

MercFiveHundred

About a week after this started to happen, the SRS just stayed on without going away. The a week after that i smelled a burning wire/plastic odor and then my steering wheel button light started going on and off - it was night and the illuminations were flickering; the buttons didnt work when the illumination was off. Then the buttons stopped workingthe next day. Now i have the SRS light, no horn, and no steering wheel buttons. In addition to the SRS, the "passenger airbag off" light/indicator in the center console is on too.

I havent checked it out because i've been too busy, but i got a heads up that it could be either the steering wheel module or the wire harness to the steering wheel. Other than looking to see if the harness wiring is burned, i dont know how to check if it's damaged. PM me your emails and i can send you the email i received.

I want to add that my heated steering wheel switch doesnt work either. Only the turn signal switch is working (turning signals and wipers).

MercFiveHundred

I replaced the aux battery in the front last winter. I was thinking about the main battery in the trunk, but i didnt get the warning light about "eletrical consumers switched off" so i figured it wasnt electrical supply related.

I heard that these SRS lights are diffcult to diagnose, but SDS would tell you the location of the error. I replaced my turn signal switch and i got the SRS light after i replaced it. My heated steering wheel didnt work either. Bought it to the dealer and told me SDS said it was in the steering column or airbag. I replaced the turn signal switch again 6months later on a hunch and that ended up being the problem. Heated steering wheel switch worked and i got the SRS light reset by SDS. Only problem is, the turn signal switch is the only thing now working on my steering wheel!!!!! LOL