Remove/install camshaft adjusters - AR05.20-P-7201ELS

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ENGINE 276.8 in MODEL 207, 212, 218

Shown on left cylinder head

Fig 1: Camshaft Adjusters Remove/Install Components

Courtesy of MERCEDES-BENZ USA

	Remove/install
1	Unfasten charge air cooler and press to the front with attached coolant lines		AR09.41-P-6819ELS
2	Rotate engine at crankshaft center bolt in direction of engine rotation to a 40°crank angle (CA) after top dead center (TDC) on cylinder 1 (ignition TDC)		AR05.10-P-7620-04MM
3	Remove right or left cylinder head cover	Left cylinder head cover	AR01.20-P-5013ELS
		Right cylinder head cover	AR01.20-P-5012ELS
4	Mount hold-down tool (5) on camshafts (4)	Tie-down set	Figure
5	Remove right or left chain tensioner	MODEL 207	AR05.10-P-7800FH
		MODEL 212, 218	AR05.10-P-7800EL
6	Loosen control valve (2) and remove	To loosen and tighten control valve (2) the camshafts (4) must be counterheld at their rear ends by a helper using a Torx T 60. The thread and bolt head contact surface of the control valve (2) must be oiled. The control valve (2) must be tightened down evenly without discontinuity with torque.
		Center valve, pulse wheel/camshaft adjuster to camshaft	*BA05.20-P-1009-02A
		Socket	Figure
7	Remove camshaft positioner (1) from camshaft (4)	The camshaft positioners (1) must not be mixed up with each other. Check basic position of camshafts (4) and adjust if necessary. Set the basic position of camshaft (4). ↓
		MODEL 207	AR05.20-P-6020FHA
		MODEL 212, 218	AR05.20-P-6020EL
8	Remove timing chain (3) from camshaft positioners (1)	The right hand timing chain (3) is placed first on the camshaft positioner (1) for the intake camshaft and then on the camshaft positioner (1) for the exhaust camshaft. The left hand timing chain (3) is placed first on the camshaft positioner (1) for the exhaust camshaft and then on the camshaft positioner (1) for the intake camshaft.
9	Install in the reverse order
	Risk of accident from vehicle starting off by itself when engine running. Risk of injury (bruises and burns) resulting from working on the engine while it is being started or when it is running.	Secure vehicle to prevent it from starting off by itself. Wear closed and snug-fitting work clothes. Do not touch hot or rotating parts.	AS00.00-Z-0005-01A
10	Perform an engine test run and check engine for functionality

CAMSHAFT, CAMSHAFT ADJUSTMENT

Number	Designation			ENGINE 276
BA05.20-P-1009-02A	Center valve, pulse wheel/camshaft adjuster to camshaft	Stage 1	Nm	130
BA05.20-P-1009-02A	Center valve, pulse wheel/camshaft adjuster to camshaft	Stage 2	∠°	-

Fig 2: Identifying Socket (271 589 00 10 00)

Courtesy of MERCEDES-BENZ USA

Fig 3: Identifying Tie-Down Set (276 589 01 40 00)

Courtesy of MERCEDES-BENZ USA