martin.quinn1

hi all im new I just bought my first mb a vito van. I need a air bag sensor will one from another vito need to be recoded after I fit it .this van is very clean 80000 genuine miles from new year 2000 cdi 110 2.2 with full mb service history it was sat in a garage for the last year, when parked up there was mot an service just done , now srs light is on. garage says the air bag ecu has gone on it and I need another. can I buy a second hand one or is each one specific to the van it was fitted to. sorry im ignorant to all things electronic.