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Home >> Mercedes Benz >> 2021 >> CLS450 Base >> Repair and Diagnosis >> Engine Mechanical >> Mechanical >> Air Intake, Turbocharging - 257 Chassis >> Testing & Repair >> Remove/Install Low-Temperature Circuit Coolant Expansion Reservoir - AR09.41-P-0001MSA

Remove/Install Low-Temperature Circuit Coolant Expansion Reservoir - AR09.41-P-0001MSA

Engine 256.9 in model 213, 238, 257, 290 

MODIFICATION NOTES

04.05.2018 Cooling system Engine 256 in models 257.358/359 BF20.00-P-1001-06MRT
04.05.2018 Cooling system Engine 256 in model 257.358/359 BF20.00-P-1001-06MRT
04.05.2018 Cooling system Engine 256 in model 213, 238, 257.361, 290 BF20.00-P-1001-06MRT
04.05.2018 Cooling system Motor 256 in model 213, 238, 257.361, 290 BF20.00-P-1001-06MRT
Fig 1: Low-Temperature Circuit Coolant Expansion Reservoir Component Location - Engine 256.9 In Model 257
G14548215Courtesy 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
Notice Notes on coolant   AH20.00-P-2080-01KOA
  Notes on coolant level   AH20.00-P-1142-01CW
REMOVINGINSTALLING Remove/install     
1 Remove cap (1).    
2 Suction off coolant from expansion reservoir (3). FLUID SPECIFICATION Cooling system *BF20.00-P-1001-06MRT 
    SPECIAL TOOL Hand pump Fig 2
3 Remove bleed line (4) and seal openings with suitable stop plugs.   AR09.41-P-1311-01AL 
    SPECIAL TOOL Record plug Fig 4
4 Remove screw/bolt (2). TORQUE SPECIFICATION Screw, low-temperature circuit expansion reservoir to crossmember *BA20.20-P-1004-02MRT 
5 Unclip expansion reservoir (3) from crossmember (5) and raise.    
6 Remove coolant hose (6) from expansion reservoir (3), collect escaping coolant, and seal openings with suitable protective covers.   AR09.41-P-1311-01AL 
    SPECIAL TOOL Set of protective caps Fig 3
7 Remove expansion reservoir (3).    
8 Install in the reverse order.    
INSPECT Check     
9 Check low-temperature circuit for leaktightness.   AR09.41-P-1011MSA 
ENGINE RADIATOR, COOLANT HOSES AND LINES

Number Designation Engine 256
BA20.20-P-1004-02MRT Screw, low-temperature circuit expansion reservoir to crossmember Nm 8
COOLING SYSTEM

Number Designation Engine 256 in model 257.358/359 Engine 256 in model 213, 238, 257.361, 290
BF20.00-P-1001-06MRT Cooling system Workshop replacement amount Main circuit Liter ≈ 12 ≈ 14
Low-temperature circuit Liter ≈ 3 ≈ 4
Antifreeze/water to -37°C % 50/50 50/50
as from -38°C % 55/45 55/45
Specifications for Operating Fluids, sheet BB00.40-P-0310-01A BB00.40-P-0310-01A
Specifications for Operating Fluids, sheet BB00.40-P-0325-06A BB00.40-P-0325-06A
Specifications for Operating Fluids, sheet BB00.40-P-0326-06A BB00.40-P-0326-06A
Fig 2: Identifying Hand Pump (210 589 00 71 00)
G13656837Courtesy of MERCEDES-BENZ USA
Fig 3: Identifying Set Of Protective Caps (001 589 00 91 00)
G12079434Courtesy of MERCEDES-BENZ USA
Fig 4: Identifying Record Plug (129 589 00 91 00)
G11065549Courtesy of MERCEDES-BENZ USA