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

WARNING: This page does not describe the selected car, but rather 33 other vehicles, including the 2016 Mercedes-Benz E63 S AMG, 2016 Mercedes-Benz E400, 2016 Mercedes-Benz E350, 2016 Mercedes-Benz E300, and 2016 Mercedes-Benz E250. However, it is still accessible from the selected car via links, so may be relevant.

ENGINE 157, 276.9, 278 in MODEL 212, 218

Engine 276 with a 53° marking

Fig 1: Camshafts Basic Position - Engine 276 With 53° Marking

Courtesy of MERCEDES-BENZ USA

Engine 276 without a 53° marking

Fig 2: Camshafts Basic Position - Engine 276 Without 53° Marking

Courtesy of MERCEDES-BENZ USA

Engine 278 with a 53° marking

Fig 3: Camshafts Basic Position - Engine 278 With 53° Marking

Courtesy of MERCEDES-BENZ USA

Engine 278 without a 53° marking

Fig 4: Camshafts Basic Position - Engine 278 Without 53° Marking (1 Of 2)

Courtesy of MERCEDES-BENZ USA

Fig 5: Camshafts Basic Position - Engine 278 Without 53° Marking (2 Of 2)

Courtesy of MERCEDES-BENZ USA

Shown on: engine 276 without a 53° marking

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

Fig 6: Camshafts Basic Position - Engine 276 Without 53° Marking

Courtesy of MERCEDES-BENZ USA

	Remove/install
1	Remove all Hall sensors on camshafts	Engine 276.9	AR15.10-P-2000EL
		ENGINE 157, 278	AR15.10-P-2000ELB
2	Remove front and central sections of the lower engine compartment paneling		AR61.20-P-1105EW
	Check
3	Check whether the 53° marking is present on the belt pulley/vibration damper (10)
4	Attach replacement marking for the 53° marking on belt pulley/vibration damper (10)	Engine without a 53° marking on belt pulley/vibration damper (10) 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).
5.1	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) The engine must not be turned back against the direction of engine rotation. The timing chain can skip and cause engine damage.
		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.
5.2	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) The engine must not be turned back against the direction of engine rotation. The timing chain can skip and cause engine damage. 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.
	Check
6	Check basic position of camshafts	The basic position of the camshafts is checked by a visual inspection over the Hall sensor opens on the cylinder head covers (2l, 2r). 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
7	Install in the reverse order