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Home >> Mercedes Benz >> 2012 >> CL65 >> Repair and Diagnosis >> Engine Mechanical >> Cooling System (Mechanical) >> Engine Cooling System -- 216.379 Cl65 AMG >> Testing & Repair >> Remove/install expansion reservoir - AR20.30-P-4950SX

Remove/install expansion reservoir - AR20.30-P-4950SX

ENGINES 156, 157, 272, 273, 275, 276, 278 in MODEL 221 

ENGINES 156, 157, 273, 275, 278 in MODEL 216 

Fig 1: Identifying Expansion Reservoir Components
G07513702Courtesy of MERCEDES-BENZ USA
REMOVINGINSTALLING Remove/install     
DANGER Risk of injury  to skin and eyes caused by scalding from contact with hot coolant spray. Risk of poisoning  caused by swallowing coolant. Do not open cooling system unless coolant temperature is below 90°C. Open cap slowly and release the pressure. Do not pour coolant into beverage containers. AS20.00-Z-0001-01A 
    Wear protective gloves, protective clothing and safety glasses.
1 Switch off ignition    
2 Slowly open cap (1) on expansion reservoir (2) and remove IMPORTANT The coolant temperature should be approx. 40°C.  
3 Clamp off coolant hose (3) using a suitable tool    
4 Suction coolant out of expansion reservoir (2) SPECIAL TOOL Fig 2
5 Disconnect electrical connector (4)    
6 Release lock (5a) and pull out coolant lines (5) from expansion reservoir (2) INSTALLATION IMPORTANT Install new O-rings (5b).  
7 Unscrew nut (6) and lift expansion reservoir (2)    
8 Remove coolant hose (3) on expansion reservoir (2) SPECIAL TOOL Fig 3
9 Install in the reverse order    
INSPECT Checking     
10 Check coolant level and correct if necessary    
NOTES Notes on coolant level   AH20.00-P-1142-01V 
11 Inspect cooling system for leaks   AR20.00-P-1010SX 
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
12 Conduct engine test run and check engine for leaks    
Fig 2: Identifying Hand Pump (210 589 00 71 00)
G07513703Courtesy of MERCEDES-BENZ USA
Fig 3: Identifying Hose Clamp Pliers (003 589 03 37 00)
G07513704Courtesy of MERCEDES-BENZ USA