Auxiliary heating out of function after light crash
 

On my W213 E 350 d I have problem with blocked auxiliary heating. It is blocked by software of central unit because of small crash with deployed airbags and seatbelts, which this car had before. Same problem was with blocked starting the engine, but it was easily repaired by diag computer. Everything is in function and car drives very well. Blocking of auxiliary heating we can"t find. There is number of fault code: B1A8100 - Blocking of auxiliary heating was activated. Can somebody help us with this problem?