Remove/install retaining lock for crankshaft/ring gear - AR03.30-P-5000SX

ENGINES 157, 273, 278 in MODEL 216 

ENGINES 157, 272, 273, 276, 278 (except 272.974) in MODEL 221 

Shown on vehicle without 4-MATIC 

Fig 1: Identifying Crankshaft/Ring Gear Retaining Lock Remove/Install Components - Shown On Vehicle Without 4-Matic

Courtesy of MERCEDES-BENZ USA

	Installing, removing
	Risk of death  caused by vehicle slipping or toppling off of the lifting platform.	Align vehicle between columns of vehicle lift and position four support plates at vehicle lift support points specified by vehicle manufacturer.	AS00.00-Z-0010-01A
	Risk of injury  to skin and eyes caused by handling hot or glowing objects.	Wear safety gloves, protective clothing and safety glasses, if necessary.	AS00.00-Z-0002-01A
1	Remove shield above the front axle transmission drive shaft	Vehicles with 4MATIC
			*BA33.30-P-1009-03G
2	Unscrew nuts (1) and remove bolts from transmission bell	For vehicles with 4-MATIC the cover (2) is on the right engine side of the vehicle and for vehicles without 4-MATIC the cover (2) is on the left engine side (see picture).
			*BA27.40-P-1008-01A
3	Remove cover (2) from crankcase
	Checking
4	Check splines of ring gear for drive plate	Check splines for wear and damage by rotating engine at the center bolt for crankshaft in its direction of rotation. Replace clutch plate if necessary: ↓
		Engine 272, 273	AR03.30-P-8001SX
		Engine 157, 276, 278	AR03.30-P-8001MM
			Figure
	Risk of injury  caused by moving parts that can pinch, crush  or, in extreme cases, even sever  extremities	No parts of the body or limbs should be within the operating range of the mechanism when moving components.	AS00.00-Z-0009-01A
5	Insert retaining lock (01) into access opening	If required, rotate engine further at center bolt for crankshaft in engine's direction of rotation until the retaining lock (01) snaps into place.
			Fig 3
6	Remove in the reverse order

Fig 2: Identifying Wrench Socket (001 589 65 09 00)

Courtesy of MERCEDES-BENZ USA

Fig 3: Identifying Retaining Lock (112 589 03 40 00)

Courtesy of MERCEDES-BENZ USA