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Home >> Mercedes Benz >> 2021 >> G63 AMG >> Repair and Diagnosis >> Engine Mechanical >> Mechanical >> Air Intake, Turbocharging - 463 Chassis >> Testing & Repair >> Remove/Install Low-Temperature Circuit Expansion Reservoir >> Remove/Install Low-Temperature Circuit Expansion Reservoir - AR09.41-P-0001MNA

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

Engine 176 in model 463 

up to model year 2019 

Engine 177 in model 205 

Fig 1: Low-Temperature Circuit Expansion Reservoir Components Location - Engine 176 In Model 463 Up To Model Year 2019
G13656352Courtesy of MERCEDES-BENZ USA
REMOVINGINSTALLING Remove/install     
1.1 Drain coolant from low-temperature circuit For removal of the lower low-temperature circuit expansion reservoir (5).
Engine 176 in model 463 up to model year 2019
AR09.41-P-6834MNF 
    Engine 177 in model 205 AR09.41-P-6834MNA
1.2 Suction coolant out of upper low-temperature circuit expansion reservoir (4) For removal of the upper low-temperature circuit expansion reservoir (4).
SPECIAL TOOL Hand pump
Fig 2
2 Detach return line (1) at upper low-temperature circuit coolant expansion reservoir (4) For removal of the upper low-temperature circuit expansion reservoir (4).  
3 Remove screw/bolt (2) For removal of the upper low-temperature circuit expansion reservoir (4).  
    TORQUE SPECIFICATION Bolt, low-temperature circuit expansion reservoir at top to low-pressure line *BA09.41-P-1011-01X 
4 Push plug coupling onto upper low-temperature circuit expansion reservoir (4) with screwdriver and detach coolant line (3) For removal of the upper low-temperature circuit expansion reservoir (4).  
5.1 Remove air duct segment on radiator package Engine 177 in model 205
For removal of the lower low-temperature circuit expansion reservoir (5).
IMPORTANT See "Remove/install fan unit".
AR20.40-P-5050MNA
5.2 Remove fan unit Engine 176 in model 463 up to model year 2019 For removal of the lower low-temperature circuit expansion reservoir (5). AR20.40-P-5050MNF
6 Detach lower coolant hose on lower low-temperature circuit expansion reservoir (5) Engine 176 in model 463 up to model year 2019 For removal of the lower low-temperature circuit expansion reservoir (5). AR20.20-P-7441-01RQ
7 Unclip vent line (6) at lower low-temperature circuit coolant expansion reservoir (5) For removal of the lower low-temperature circuit expansion reservoir (5).  
8 Remove screw/bolt (7) For removal of the lower low-temperature circuit expansion reservoir (5).
TORQUE SPECIFICATION Bolt, low-temperature circuit expansion reservoir at bottom to charge air cooler bracket
*BA09.41-P-1010-01X 
9 Push plug coupling onto lower low-temperature circuit expansion reservoir (5) with screwdriver and detach coolant line (3) For removal of the lower low-temperature circuit expansion reservoir (5).  
10.1 Move lower low-temperature circuit expansion reservoir (5) out of the bracket and remove lower low-temperature circuit expansion reservoir (5) upwards For removal of the lower low-temperature circuit expansion reservoir (5).  
10.2 Remove upper low-temperature circuit expansion reservoir (4) upwards For removal of the upper low-temperature circuit expansion reservoir (4).  
11 Install in the reverse order    
INSPECT Check     
12 Check coolant level in upper low-temperature circuit expansion reservoir (4) and correct if necessary For removal of the upper low-temperature circuit expansion reservoir (4).
FLUID SPECIFICATION Engine 176 in model 463
*BF20.00-P-1001-06A 
    up to model year 2019 Cooling system
FLUID SPECIFICATION Engine 177.9 in model 205 Cooling system
BF20.00-P-1001-02LA
13 Check low-temperature circuit for leaktightness Engine 176 in model 463 up to model year 2019 AR09.41-P-1011MNF 
    Engine 177 in model 205 AR09.41-P-1011MNA
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
14 Perform an engine test run and in doing so check low-temperature circuit for proper function    
CHARGE AIR LINE/CHARGE AIR COOLING

Number Designation Engine 176 Engine 177
BA09.41-P-1010-01X Bolt, low-temperature circuit expansion reservoir at bottom to charge air cooler bracket Nm 9 9
CHARGE AIR LINE/CHARGE AIR COOLING

Number Designation Engine 176 Engine 177
BA09.41-P-1011-01X Bolt, low-temperature circuit expansion reservoir at top to low-pressure line Nm 9 9
COOLING SYSTEM

Number Designation Engine 177 in model 205
BF20.00-P-1001-02LA Cooling system Workshop replacement amount Main circuit Liter ≈ 11, 1
Low-temperature circuit Liter ≈4, 6
Antifreeze/water Down to -37°C % 50/50
-38°C and below % 55/45
Specifications for Operating Fluids, sheet   BB00.40-P-0310-01A
Specifications for Operating Fluids, sheet   BB00.40-P-0325-06A
Specifications for Operating Fluids, sheet   BB00.40-P-0326-06A
COOLING SYSTEM

Number Designation Engine 176 in model 463 up to model year 2019 Engine 176 in model 463 as of model year 2019
BF20.00-P-1001-06A Cooling system Workshop replacement amount Main circuit Liter ≈6, 4 ≈13
Low-temperature circuit Liter ≈1, 5 ≈4, 6
Antifreeze/water Down to -37°C % 50/50 50/50
-38°C and below % 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: IdentifyingHand Pump (210 589 00 71 00)
G13656353Courtesy of MERCEDES-BENZ USA