Seat Airbag warning light.

[PROJUMPER]

The SRS warning light is on the car won't go through its MOT, I have another MERCEDES BENZ SRS CONTROL UNIT ECU AIRBAG off a secondhand car, will it need re-coding?

 

[mersum1es]

which car it is? May be not control unit at all, usually totally something else like seat sensor etc... pull the fault codes.

 

[PROJUMPER]

which car it is? May be not control unit at all, usually totally something else like seat sensor etc... pull the fault codes.

SLK 200 Kompressor 2006

 

[M80]

You can get a bypass from eBay, approx £36.
It plugs in under the seat.

 

[LostKiwi]

Read the codes first to identify what's failing.
Test, don't guess.