Remove/install front door lock cylinder - AR72.10-P-4015MCC

MODEL 451.3/4 except CODE (L15) United Kingdom 

Fig 1: Identifying Front Door Lock Cylinder Remove/Install Components

Courtesy of MERCEDES-BENZ USA

	Remove/install
1	Remove left door handle (1).		AR72.10-P-2400MCC
2	Remove retaining spring (5).
3	Remove relay lever (3)	The guide (arrow) of the lock cylinder (7) should be positioned vertically in the stator (4), as shown. Only then it is possible to install the relay lever (3) correctly. Ensure that spring (6) is correctly installed in relay lever (3).
4	Unclip bracket (8) from stator (4) and remove stator (4) with lock cylinder (7) from door handle (1).
5	Insert transmitter key (A) into lock cylinder (7).
6	Remove retaining spring (9).
7	Pull lock cylinder (7) out of stator (4).	Before removing transmitter key (A) from removed lock cylinder (7), secure locking wedges against falling out with suitable adhesive tape.
8	Install in the reverse order