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Home >> Mercedes Benz >> 2021 >> CLS450 Base >> Repair and Diagnosis >> Engine Mechanical >> Blowers, Superchargers & Turbochargers >> Air Intake, Turbocharging - 257 Chassis >> Testing & Repair >> Remove/Install Right Engine Coolant Circulation Pump For Low-Temperature Circuit - AR09.41-P-6931MSA

Remove/Install Right Engine Coolant Circulation Pump For Low-Temperature Circuit - AR09.41-P-6931MSA

Engine 256.9 in model 213, 238, 257, 290 

Fig 1: Right Engine Coolant Circulation Pump Component Location (Low-Temperature Circuit) - Engine 256.9 In Model 257
G14548236Courtesy of MERCEDES-BENZ USA
WARNING Risk of injury  to skin and eyes suffering scalding from contact with hot coolantspray. 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
Topical note Information on preventing damage to electronic components due to electrostatic discharge   AH54.00-P-0001-01A
REMOVINGINSTALLING Remove/install     
1 Drain coolant from low-temperature circuit.   AR09.41-P-6834MSA 
2 Release and disconnect electrical connectors (1, 4).    
3 Remove coolant hoses (2, 3) from low-temperature circuit circulation pump 1 (M43/6)   AR09.41-P-1311-01AL 
4 Remove bolt (6). TORQUE SPECIFICATION M6X1 *BA00.10-P-1002-04A 
5 Remove low-temperature circuit circulation pump 1 (M43/6).    
6 Install in the reverse order.    
METRIC SCREWS/BOLTS AND NUTS AS PER MBN 10 105, 10 143

Number Designation 8.8 10.9
BA00.10-P-1002-04A M6X1 Nm 9 13