The electronic ignition lock control module (N73) must be version coded. The version coding is menu-driven. Entry into the version coding is via: Body and accessories - Electronic ignition lock - Control module adaption - Version coding

Possible version coding

Version
Vehicle version	W202/S202/C208/W210/S210
Left hand/right hand steering	LHS/RHS
Auxiliary fan A/C system	Yes/No
Rain sensor	Yes/No
Speed relative wiper control	Yes/No
Special vehicles multi-function control module	Production, panic alarm/Police, authorities/Taxi with emergency alarm/Taxi without emergency alarm
Multi-function control module, special vehicles	Yes/No
Electric seat adjustment, driver's seat with memory	Yes/No
Electric seat adjustment, passenger seat with memory	Yes/No