Remove/install retaining lock for crankshaft / ring gear engine 272 - AR03.30-P-5000VA

ENGINE 272.942 in MODEL 171.454 

ENGINE 272.963 in MODEL 171.456 

Fig 1: Identifying Retaining Lock

Courtesy of MERCEDES-BENZ OF NORTH AMERICA.

	Remove/install
1	Raise vehicle with lifting platform		AR00.60-P-1000V
2	Remove bottom engine compartment paneling		AR61.20-P-1105V
3	Dismount assembly flap at the engine	The starter must not be removed.
	Checking
4	Check toothing of the ring gear on the two-mass flywheel or on the drive plate	Check the splines for wear and damage by continuing to rotate the engine at the center bolt of the crankshaft in the engine's direction of rotation. If necessary: ↓
		Replace the two-mass flywheel or drive plate	AR03.30-P-8001V
	Risk of injury caused by moving parts that can pinch, crush or  , in extreme cases even sever  extremities.	Keep body parts and limbs well clear of moving parts.	-
5	Insert the retaining lock (5) into the access opening and allow it to latch into the ring gear	If required, rotate the engine further at the center bolt of the crankshaft in the engine's direction of rotation until the retaining lock (5) snaps completely into place.
		Retaining lock	Fig 2
6	Install in the reverse order

Fig 2: Identifying Retaining Lock (112 589 03 40 00)

Courtesy of MERCEDES-BENZ OF NORTH AMERICA.