My SRS light came on out of the blue, took it to a mate with a diagnostic and got fault 9920 "ignition circuit with component R12/9 (drivers side airbag ingition squib) has short circuit to ground"

any idea's regarding this fault before i start ripping the steering coloum to bits??

Car is a 03 E class 270 cdi

 

Remove seat back and check squib connector to side airbag harness - blue/yellow wiring with orange/green connector.

 

Thanks, i'll have a look

 

ok, checked the connector into the airbag & the main connector under the seat, nothing obvious but cleaned em and sprayed with WB40. if it was a dodgy connection, am i right in thinking the light would not go out on it's own and it would have to be reset via diagnostic tool?

 

Correct, stored fault code(s) need to be erased using SDS. If problem persists, resistance value “may” be too high requiring connector replacement utilizing repair harness part # 0025402305

 

thanks, i'l nip down to my mates 2morrow and see what his diagnostic says

 

Sorted, reset code and the light stayed out, thanks again Konigstiger

 

Damn, the lights come back on again after a couple of weeks guess i'll try the wiring repair harness, any idea of the price?

 

Ordered a loom from MB, £19.99 so hopfully that will sort it..

 

i have to check that as well. will this cause my battery to drain as well? thanks

 

I believe I’ve repaired this problem in the past by bypassing the X connector under the seat with the w220 X connector repair harnesses. No it shouldn’t drain your battery. This was a repair fix for the 209 clkS as I recall but also works for the w211

 

would this connector look the same on a 2007 GL?

you guys got any pics of it?