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Home >> Mercedes Benz >> 2011 >> C63 >> Repair and Diagnosis >> Heating, Ventilation & A/C (HVAC) >> A/C Compressor >> Belt Drives - Testing & Repair - C63/C350 (204) >> Testing & Repair >> Remove/install belt drive components (Engine 272) - AR13.20-P-0001CV

Remove/install belt drive components (Engine 272) - AR13.20-P-0001CV

ENGINE 272 in MODEL 204 

Illustrated on model 204 

Fig 1: Identifying Belt Drive Remove/Install Components
G07532772Courtesy of MERCEDES-BENZ USA
Fig 2: Identifying Exploded View Of Guide Pulleys
G07532773Courtesy of MERCEDES-BENZ USA
REMOVING Removing     
DANGER Risk of injury  caused by moving parts that can pinch, crush or, in extreme cases, even sever  extremities No parts of the body or limbs should be within the operating range of the mechanism when moving components. AS00.00-Z-0009-01A
1 Open engine hood and raise to vertical position Model 204
Model 207
AR88.40-P-1000EW
2 Pull out front engine cover (1) upwards from mounts    
3 Slacken poly-V belt (2), take off and detension tensioner pulley IMPORTANT To do this use a hexagon (4) on the poly-V belt tensioning device (3).  
INSPECT Checking     
4 Check profile of belt pulley and poly-V belt tensioning device (3) for damage and soiling    
5 Check poly-V belt (2) for wear and damage and replace if necessary    
REFER TO MAINTENANCE Check visible area of poly-V belt for wear Model 204 AP13.22-P-1352CW 
  Only perform steps 6 through 10 for removal/installation of poly-V belt tensioning device (3)     
6 Replace poly-V belt tensioning device (3) with drift (8)    
7 Remove bolts (3b) and poly-V belt tensioning device (3) TORQUE SPECIFICATION *BA13.25-P-1001-01P 
INSPECT Checking     
8 Check poly-V belt tensioning device (3) for damage and soiling; replace if necessary    
9 Remove drift (8) and detension poly-V belt tensioning device (3) Only when replacing the poly-V belt tensioning device (3)  
10 Install in the reverse order    
  Only perform steps 11 through 14 for removal/installation of guide pulleys (5)     
11 Remove fan unit Engine 273 AR20.40-P-5050CW
12 Pry off covers (5b)    
13 Remove bolts (5a) and remove guide pulleys (5) TORQUE SPECIFICATION *BA20.10-P-1004-01U 
14 Install in the reverse order    
INSTALLING Install     
15 Fit on and tension (2) as per routing diagram and tension IMPORTANT To do this use a hexagon (4) on the poly-V belt tensioning device (3). AR13.22-P-3902-02SX 
    NOTES Do not use wax or similar products, as this may cause poly-V belt (2) to slip.  
16 Install front engine cover (1)    
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    
BELT TENSIONING DEVICE

Number  Designation    Engine 272  Engine 273 
BA13.25-P-1001-01P Bolt from poly-V belt tensioning device to timing case cover Nm 35 35
COOLANT PUMP, COOLANT THERMOSTAT

Number  Designation      Engine 272  Engine 273 
BA20.10-P-1004-01U Bolt, guide pulley between water pump and belt tensioner Initial installation Nm 35 35
  Follow-up operations   Nm 25 25