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Check basic position of camshafts - AR05.20-P-6010ELS

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ENGINE 276.8 in MODEL 212, 218 

Fig 1: Camshafts Basic Position (1 Of 3)
G09974328Courtesy of MERCEDES-BENZ USA
Fig 2: Camshafts Basic Position (2 Of 3)
G09974329Courtesy of MERCEDES-BENZ USA

Right Cylinder Head (A)/Left Cylinder Head (B) 

Fig 3: Camshafts Basic Position (3 Of 3)
G09974330Courtesy of MERCEDES-BENZ USA
REMOVINGINSTALLING Remove/install     
1 Remove all Hall sensors on camshafts   AR15.10-P-2000EL
2 Remove front and central sections of the lower engine compartment paneling   AR61.20-P-1105EW
3 Detach charge air cooler and pull to the front with attached coolant lines   AR09.41-P-6819ELS
INSPECT Check     
4 Check whether the 53°marking is present on the belt pulley/vibration damper (10)    
5 Attach adhesive strip (11) for the 53°marking on belt pulley/vibration damper (10) Engine without a 53° marking on belt pulley/vibration damper (10)
IMPORTANT Attach adhesive strips (11) with a length of 17 mm to the 40°marking on belt pulley/vibration damper (10). The end of the adhesive strip (11) marks the 53°marking missing on the belt pulley/vibration damper (10).		  
6.1 Rotate engine at crankshaft center bolt in direction of engine rotation to a 53° crank angle after top dead center (TDC) on cylinder 1 (ignition TDC) Engine with a 53° marking on belt pulley/vibration damper (10)
NOTES The engine must not be turned back against the direction of engine rotation.
The timing chain can skip and cause engine damage.
IMPORTANT Rotate engine at crankshaft in direction of engine rotation until the marking 53° on belt pulley/vibration damper (10) matches with reference edge (10a). The reference edge (10a) is located for engine 276 on the coolant pump and for engine 157, 278 on the poly-V belt tensioning device.		  
6.2 Rotate engine at crankshaft center bolt in direction of engine rotation to the end of the adhesive strip (11) (53° crank angle (KW) after top dead center (TDC) on cylinder 1 (ignition TDC)) Engine without a 53° marking on belt pulley/vibration damper (10)
NOTES The engine must not be turned back against the direction of engine rotation.
The timing chain can skip and cause engine damage.
IMPORTANT Rotate engine at crankshaft in direction of engine rotation until the marking 53° (end of the adhesive strip (11)) on belt pulley/vibration damper (10) matches with reference edge (10a). The reference edge (10a) is located for engine 276 on the coolant pump and for engine 157, 278 on the poly-V belt tensioning device.		  
INSPECT Check     
7 Check basic position of camshafts IMPORTANT The basic position of the camshafts is checked by a visual inspection over the Hall sensor opens on the cylinder head covers (2l, 2r).
IMPORTANT On the cylinder head covers (2l, 2r) the edges of the partial segments (1a) of the segment discs (1) must  be visibly in the middle in the Hall sensor openings (picture A, B).
If the basic setting is not correct:
↓
Set basic position of camshafts.		 AR05.20-P-6020EL 
8 Install in the reverse order    
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