Remove/install ignition/starter switch lock cylinder - AR54.25-P-1030MCU

MODEL 451.3/4 

Fig 1: Identifying Ignition/Starter Switch Lock Cylinder Components

Courtesy of MERCEDES-BENZ OF NORTH AMERICA.

	Removing
1	Remove transponder coil and put to one side with electrical line connected		AR80.35-P-4515MCU
2	Remove clamp (2)
3	Insert transmitter key (3) into the lock cylinder of the ignition/starter switch (1) and switch on ignition (circuit 15)	Ensure that the selector lever is located in position "P".
4	Slide in feeler gauge (4), on the left side as shown, between the lock cylinder of the ignition/starter switch (1) and electronic selector lever module control unit (N15/5)	Use blade of feeler gauge (4) with the thickness of 0.15 mm.
5	Pull out lock cylinder of ignition/starter switch (1) with transmitter key (3) upwards	If necessary move the feeler gauge (4) slightly, so that the locking device (5) is released from the bracket (arrow).
	Install
6	Insert lock cylinder of ignition/starter switch (1) with transmitter key (3) in the electronic selector lever module control unit (N15/5)	Ensure that the selector lever is located in position "P". The lock cylinder of the ignition/starter switch (1) must engage audibly in the electronic selector lever module (N15/5) control unit.
7	Remove transmitter key (3)
8	Install transponder coil		AR80.35-P-4515MCU