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Home >> Mercedes Benz >> 2018 >> S450 Base >> Repair and Diagnosis >> Engine Mechanical >> Mechanical >> Air Intake, Turbocharging - 222 Chassis (1 Of 2) >> Testing & Repair >> Remove/Install Coolant Expansion Reservoir For Low-Temperature Circuit >> Remove/Install Lower Coolant Expansion Reservoir For Low-Temperature Circuit - AR09.41-P-0060MNL

Remove/Install Lower Coolant Expansion Reservoir For Low-Temperature Circuit - AR09.41-P-0060MNL

Engine 176 in model 217, 222 

with small lower coolant expansion reservoir for low-temperature circuit 

Shown on engine 176 in model 222 

G15362323Courtesy 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
Notice  Notes on coolant   AH20.00-P-2080-01KOA
  Notes on coolant level   AH20.00-P-1142-01CW
REMOVINGINSTALLING Remove/install     
1 Drain off coolant in low-temperature circuit   AR09.41-P-6834MNL 
    INSTALLATION IMPORTANT:  Only install lower engine compartment linings and upper engine cover after engine test run.  
2 Remove fan unit   AR20.40-P-5050MNL
3 Actuate connector coupling, remove feed line (3) at lower coolant expansion reservoir for low-temperature circuit (6) and seal openings with suitable stop plugs SPECIAL TOOL Record plug Fig 2
4 Remove coolant hose (7) from bottom coolant expansion reservoir for low-temperature circuit (6) and seal openings with protective covers   AR20.20-P-7441-01RQ
    SPECIAL TOOL Set of protective covers Fig 1
5 Remove screw/bolt (8) TORQUE SPECIFICATION Screw, low-temperature circuit expansion reservoir at bottom to charge air cooler/crankcase/cylinder head cover holder *BA09.41-P-1010-01X 
6 Remove vacuum line (9) at lower coolant expansion reservoir for low-temperature circuit (6)    
7 Slide lower coolant expansion reservoir for low-temperature circuit (6) in direction of arrow and remove    
8 Install in the reverse order.    
INSPECT Check     
9 Check coolant level in the top coolant expansion reservoir for low-temperature circuit and correct if necessary FLUID SPECIFICATION Cooling system *BF20.00-P-1001-06A 
10 Check low-temperature circuit cooling system for leaktightness   AR09.41-P-1011MNL 
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
11 Perform an engine test run and in doing so check low-temperature circuit for proper function    
12 Install lower engine compartment paneling   AR61.20-P-1105LF
13 Install upper engine cover    
CHARGE AIR LINE/CHARGE AIR COOLING

Number Designation Engine 176
BA09.41-P-1010-01X Screw, low-temperature circuit expansion reservoir at bottom to charge air cooler/crankcase/cylinder head cover holder Nm 9
COOLING SYSTEM

Number Designation Engine 176 in model 217 Engine 176 in model 222
BF20.00-P-1001-06A Cooling system Workshop replacement amount Main circuit Liter ≈ 14 ≈ 14
Low-temperature circuit Liter ≈ 4 ≈ 4
Antifreeze/water Down to -37°C % 50/50 50/50
-38°C and below % 55/45 55/45
Fluids Specifications BB00.40-P-0310-01A BB00.40-P-0310-01A
Fluids Specifications BB00.40-P-0325-06A BB00.40-P-0325-06A
Fluids Specifications BB00.40-P-0326-06A BB00.40-P-0326-06A
Fig 1: Identifying Set Of Protective Covers (001 589 11 91 00)
G14786196Courtesy of MERCEDES-BENZ USA
Fig 2: Identifying Record Plug (129 589 00 91 00)
G12078802Courtesy of MERCEDES-BENZ USA