Turn electronic ignition switch to position 1 or 2, function

Function

If the verification of the transmitter key (A8/1) by the electronic ignition switch control unit (N73) is successful, the rotary lock in the electronic ignition switch control unit (N73) is enabled. The transmitter key (A8/1) can now be turned to position 1 or 2.

 If the drive authorization is valid and the brake pedal is actuated at the same time, the selector lever lock is canceled. The selector lever can now be moved out of the "P" position.

The transmitter key (A8/1) cannot be removed in positions 1 and 2.

Position 1

If the transmitter key (A8/1) is turned in position 1, the EIS control unit (N73) transmits the message c. ON via the Controller Area Network bus, class B (passenger compartment) (CAN-B) 15R.

Position 2

If the transmitter key (A8/1) is turned in position 2, the EIS control unit (N73) transmits the message c. 15 ON via the CAN-B and the Controller Area Network bus, class C (engine compartment). Drive authorization is checked in position 2 via encrypted data exchange between the EIS control unit (N73) and the ME-SFI control unit (N3/10) (on vehicles with gasoline engines) or CDI control unit (N3/9) (only model 220 with diesel engines).

Position 3

If the transmitter key (A8/1) is turned in position 3, the engine is started.The transmitter key (A8/1) is automatically turned back to position 2 after releasing.