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Remove/install camshafts - AR05.20-P-6992AMG

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ENGINES 156.### ## as of 001178 

Shown on right cylinder head 

Fig 1: Camshafts Remove/Install Components - Shown On Right Cylinder Head
G09974351Courtesy of MERCEDES-BENZ USA

Tightening sequence on right cylinder head 

Fig 2: Right Cylinder Head Camshafts Tightening Sequence - Shown On Engine 156 As Of 001178
G09974352Courtesy of MERCEDES-BENZ USA

Tightening sequence on left cylinder head 

Fig 3: Left Cylinder Head Camshafts Tightening Sequence - Shown On Engine 156 As Of 001178
G07320715Courtesy of MERCEDES-BENZ USA
REMOVING Removing     
DANGER Risk of explosion  caused by fuel igniting, risk of poisoning  caused by inhaling and swallowing fuel and risk of injury  to eyes and skin caused by contact with fuel No fire, sparks, open flames or smoking. Pour fuels only into suitable and appropriately marked containers.
Wear protective clothing when handling fuel.		 AS47.00-Z-0001-01A
DANGER Risk of injury  caused by fingers being pinched or crushed  when removing, installing or aligning hoods, doors, trunk lids, liftgates or sliding roof Keep body parts and limbs well clear of moving parts. AS00.00-Z-0011-01A
NOTES Notes on self-locking nuts and bolts   AH00.00-N-0001-01A
DANGER Risk of explosion  caused by oxyhydrogen gas. Risk of poisoning  and caustic burns caused by swallowing battery acid. Risk of injury  caused by burns to skin and eyes from battery acid or when handling damaged lead-acid batteries No fire, sparks, open flames or smoking. Wear acid-resistant gloves, clothing and glasses. Only pour battery acid into suitable and appropriately marked containers. AS54.10-Z-0001-01A
1 Switch off ignition    
2 Remove partition wall between wheel wells Model 251 AR62.30-P-2400RT
3 Remove air filter housing Model 164, 251 AR09.10-P-1150GZS
    Model 204, 212 AR09.10-P-1150CMG
    Model 209, 211, 219 AR09.10-P-1150TMG
    Model 216, 221 AR09.10-P-1150SMG
    Model 230 AR09.10-P-1150RMG
4 Remove spark plugs IMPORTANT Only if it is not possible to crank engine due to high compression.
Model 164, 251		 AR15.12-P-1010GZS
    Model 204, 212 AR15.12-P-1010CMG
    Model 209, 211, 219 AR15.12-P-1010TMG
    Model 216, 221 AR15.12-P-1010SMG
    Model 230 AR15.12-P-1010RMG
5 Rotate engine at crankshaft center bolt in direction of rotation of engine to a 40° crankshaft angle after top dead center (TDC) on cylinder 1 IMPORTANT Rotate engine at crankshaft in running direction until scribe mark 40° on pulley/vibration damper corresponds with scribe mark on timing case.  
6 Remove cylinder head covers Model 204, 212 AR01.20-P-5014CMG
    Model 209, 211, 219 AR01.20-P-5014TMG
    Model 216, 221 AR01.20-P-5014SMG
    Model 230 AR01.20-P-5014RMG
    Model 164, 251 AR01.20-P-5014GZS
7 Remove all camshaft adjusters (1)   AR05.20-P-7201AMG 
8 Remove bolts (2) for camshaft bearing cap (3) NOTES If camshaft bearing caps (3) have no identification markings, the original position must be marked. Interchanged bearing caps can lead to engine damage. AR05.20-P-6992-09AMG
9 Remove camshafts (4) IMPORTANT Identify the position of camshafts (4) in the cylinder head. If the camshafts (4) have no identification markings for the intake and exhaust side, these must be marked.  
INSPECT Checking     
10 Check camshafts (4) and camshaft bearing caps (3) for galling and score marks    
INSTALLING Install     
11 Insert the camshafts (4) IMPORTANT Follow the camshaft markings. Oil the bearing surfaces!  
12 Install camshaft bearing caps (3) IMPORTANT Observe tightening procedure! AR05.20-P-6992-09AMG
    TORQUE SPECIFICATION *BA01.30-P-1001-01U 
13 Turn camshafts (4) into basic position IMPORTANT Lock camshafts (4) using holding device and straightedge.  
    SPECIAL TOOL Fig 4
14 Install all camshaft adjusters (1)   AR05.20-P-7201AMG 
15 Install cylinder head covers Model 164, 251 AR01.20-P-5014GZS
    Model 204, 212 AR01.20-P-5014CMG
    Model 209, 211, 219 AR01.20-P-5014TMG
    Model 216, 221 AR01.20-P-5014SMG
    Model 230 AR01.20-P-5014RMG
16 Install spark plugs If necessary
Model 164, 251		 AR15.12-P-1010GZS
    Model 204, 212 AR15.12-P-1010CMG
    Model 209, 211, 219 AR15.12-P-1010TMG
    Model 216, 221 AR15.12-P-1010SMG
    Model 230 AR15.12-P-1010RMG
17 Remove/install between the wheel well liners Model 251 AR62.30-P-2400RT
18 Install air filter housing Model 164, 251 AR09.10-P-1150GZS
    Model 204, 212 AR09.10-P-1150CMG
    Model 209, 211, 219 AR09.10-P-1150TMG
    Model 216, 221 AR09.10-P-1150SMG
    Model 230 AR09.10-P-1150RMG
DANGER 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
17 Carry out engine test run    
CYLINDER HEAD

Number Designation Engine 156
BA01.30-P-1001-01U Bolt, camshaft bearing cap/bearing bridge M6 Nm 10
Fig 4: Identifying Holding Device (156 589 00 61 00)
G09974354Courtesy of MERCEDES-BENZ USA
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