Remove/install poly-V belt - AR13.22-P-1202SMG

ENGINE 156 in MODEL 216, 221 

Symbolic representation 

Fig 1: Identifying Poly-V Belt Remove/Install Components

Courtesy of MERCEDES-BENZ USA

	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  caused by fingers being pinched or crushed  when removing, installing or aligning hoods, doors, trunk lids, tailgates or sliding roof.	Keep body parts and limbs well clear of moving parts.	AS00.00-Z-0011-01A
1	Open engine hood
2	Remove left and right intake air duct
3	Remove front engine cover	Do not tilt front engine cover, but lift upwards vertically otherwise the retaining lugs can break off.
4	Raise vehicle with lifting platform		AR00.60-P-1000SX
5	Remove lower engine compartment paneling		AR61.20-P-1105SX
6	Loosen poly-V belt (1) and remove	The tensioner pulley (2) is more accessible from below. To do this, turn hexagon (3) at tensioner pulley (2) in an anti-clockwise direction and lock the tensioning pulley (2) with a pin or drift (4) (ø 5 mm).
	Checking
7	Inspect belt pulley sections and tensioning device	Check for damage, wear and dirt; replace if necessary.
8	Check guide pulley	Replace if necessary.
			*BA13.25-P-1003-01U
			*BA13.25-P-1004-01U
			*BA13.25-P-1005-01U
9	Check poly-V belt (1)
	Check poly-V belt (1) in visible range for wear		AP13.22-P-1352SX
	Install
10	Install poly-V belt (1) and tighten it.	Do not use belt wax or any similar products. Start in numerical order of the relevant running diagram at tensioner pulley (2), refer to: ↓
		Layout diagram of poly-V belt	AR13.22-P-3902-02AMG
	Risk of accident  caused by vehicle starting off by itself when engine is running. Risk of injury  caused by contusions and burns during starting procedure or when working near the engine as it is running	Secure vehicle to prevent it from moving by itself. Wear closed and snug-fitting work clothes. Do not touch hot or rotating parts.	AS00.00-Z-0005-01A
11	Carry out engine test run
12	Close engine hood