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SRS flashing light W204 after faulty battery, airbag control unit needs programming", then says a fault has occurred

nijx99

New Member
Joined
Apr 30, 2025
Messages
1
Location
edgware, london
Car
w204
Hello
My battery had a fault where there was no charge left, subsequently the airbag light started flashing.
The MD Indi has accessed the airbag control unit at which point it says "airbag control unit needs programming", then when they try to do anything it says a fault has occurred, but there are no specific error codes

How can this be fixed? i'm loathed to buy a new SRS module for £400.
It seems the used modules from ebay are locked - how could i get that programmed to my car?

any help is appreciated - the indi said i can take the car there again and screen shot the steps taken.

thanks
 

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