2003 c320 4 matic. ok i have been searching and finding different answers. my air bag module might be faulty or maybe a bad connection? if i buy a used air bag module, does the bosch number just have to match example( bosch 001 820 97 26) or does the serial number have too also? have n2/7 faulty code. I have front air bags and side airbags , no tele aid, and maybe a phone option(the plug is there and i have the option to select via steering wheel)

codes my scanner says: b1003 ( n2/7 restraint systems control unit) control unit terminal 15r/15 undervoltage. fuse 45 and 49 are good. What and where is the connections i have to check?

b2d92 control unit n2/7 (restraint systems control unit) defective
b1075 can bus communication is faulty

my scanner gave me this info on my module. bosch 001 820 97 26
sn#46950797
date of manufacture 20.11.02

 

Bump

 

Find a unit with the same number, but from a scrapyard it could have crash data stored, You will need to unlock the ecu to program it and write the current vin. After that it must be locked