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Home >> Mercedes Benz >> 2014 >> ML350 Base >> Repair and Diagnosis >> Engine Mechanical >> Blowers, Superchargers & Turbochargers >> Air Intake, Turbocharging - 166 Chassis >> Testing & Repair >> Remove/install charge air cooler, water-cooled - AR09.41-P-6819GQC

Remove/install charge air cooler, water-cooled - AR09.41-P-6819GQC

ENGINE 276.8 in MODEL 166, 251 

MODIFICATION NOTES

26.9.14 Coolant Mixture ratio BF20.00-P-1001-04A
Fig 1: Identifying Charge Air Cooler Remove/Install Components
G09981848Courtesy of MERCEDES-BENZ USA
REMOVINGINSTALLING Remove/install     
DANGER Risk of injury  to skin and eyes suffering scalding from contact with hot coolant spray. Risk of poisoning  from 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.
Wear protective gloves, protective clothing and safety glasses.
AS20.00-Z-0001-01A
1 Remove front section of lower engine compartment paneling    
2 Drain coolant from low-temperature circuit    
NOTES Notes on coolant   AH20.00-N-2080-01A
IMPORTANT Open cap of the coolant expansion reservoir for the low-temperature circuit.
IMPORTANT Detach lower coolant hose on the coolant connection (2).
IMPORTANT Collect coolant in a suitable container.
 
FLUID SPECIFICATION Coolant mixing ratio *BF20.00-P-1001-04A 
3 Unfasten bracket from Active Roll Stabilization oil line on charge air cooler (3) ENGINE 276.8 in MODEL 166
with CODE 468 (ACTIVE CURVE SYSTEM)
 
4 Loosen right charge air line on alternator holder   AR09.41-P-8620GQC 
5 Loosen left charge air line on A/C compressor bracket   AR09.41-P-8620GQC 
6 Loosen clamps (7) and push hose (6) downwards    
7 Loosen clamp (5)    
8 Detach upper coolant hose on coolant connection (2)    
9 Detach vent line (4) at charge air cooler (3)    
10 Disconnect electrical line at charge air temperature sensor (B17/8) and on pressure sensor upstream of throttle valve (B28/6)    
11 Unclip retaining clamp (1), pull charge air cooler (3) to the front and remove    
12 Detach connection piece between throttle valve and charge air cooler (3) from charge air cooler (3) When replacing the charge air cooler (3)  
13 Remove charge air temperature sensor (B178) When replacing the charge air cooler (3)  
14 Remove pressure sensor upstream of throttle valve (B28/6) When replacing the charge air cooler (3)  
15 Install in the reverse order    
DANGER 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
16 Carry out an engine test run while checking the cooling system for leaktightness and the engine for proper operation    
COOLANT MIXING RATIO

Number Designation ENGINE ALL
BF20.00-P-1001-04A Coolant mixing ratio Antifreeze/water until -37°C 50/50
Antifreeze/water until -45°C 55/45
Specification Coolant (Specification 310.1)