LEMON Manuals: Even more car manuals for everyone: 1960-2025
Home >> Mercedes Benz >> 2021 >> CLA250 Base >> Repair and Diagnosis (Single Page) >> Engine Mechanical >> Cooling System (Mechanical) >> Air Intake, Turbocharging -- 118 Chassis >> Testing & Repair >> Remove/Install Circulation Pump For Low Temperature Circuit >> Remove/Install Circulation Pump For Low Temperature Water Circuit - AR09.41-P-6925MFG
April 5, 2026: LEMON Manuals is launched! Read the announcement.

Remove/Install Circulation Pump For Low Temperature Water Circuit - AR09.41-P-6925MFG

Engine 139 in model 118, 177, 247 

Fig 1: Circulation Pump For Low Temperature Water Circuit Components Location - Model 118 In Engine 139
G16048443Courtesy 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 overpressure. Do not pour coolant into beverage containers.
Wear protective gloves, protective clothing and safety glasses.
AS20.00-Z-0001-01A
CAUTION Risk of injury  caused by scraping or cutting body parts on sharp vehicle parts Always wear protective gloves when working on or near sharp and non-deburred vehicle parts.
Deburr repair panels.
AS00.00-Z-0017-01A
Notice  Notes on avoiding damage through contamination and foreign objects   AH00.00-P-5000-01A
REMOVINGINSTALLING Remove/install     
1 Drain off Low Temperature circuit coolant.   AR09.41-P-6834MFG 
2 Remove front left fender liner. INSTALLATION IMPORTANT : Only install left front fender liner after leak test. AR88.10-P-1301MFA
3 Release and disconnect electrical connectors (3) and place electrical wiring harness to one side.    
4 Remove coolant hoses (1) from Low Temperature circuit circulation pump (M45/5) and place to one side.   AR09.41-P-1311-01AL 
5 Seal openings using protective cover. SPECIAL TOOL Set of protective covers Fig 2
6 Remove screw (2) and open retaining bracket. TORQUE SPECIFICATION Screw/nut, charge air cooler circulation pump retaining bracket/circulation pump to holder *BA20.10-P-1011-01AC 
7 Remove Low Temperature circuit circulation pump (M45/5).    
8 Install in the reverse order.    
WARNING 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
9 Carry out engine test run and check engine for proper operation and leak tightness.    
10 Install left front fender liner.   AR88.10-P-1301MFA
COOLANT PUMP, COOLANT THERMOSTAT

Number Designation Engine 139
BA20.10-P-1011-01AC Screw/nut, charge air cooler circulation pump retaining bracket/circulation pump to holder Nm 8
Fig 2: Identifying Set Of Protective Covers (001 589 06 91 00)
G14785718Courtesy of MERCEDES-BENZ USA