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Home >> Mercedes Benz >> 2020 >> S450 Base >> Repair and Diagnosis >> Transmission >> Transmission Control Systems >> Automatic Transmission - 222 Chassis (3 Of 4) >> Testing & Repair >> Remove/Install Automatic Transmission Fluid Cooler >> Remove/Install Automatic Transmission Fluid Cooler - AR27.55-P-1000MNK

Remove/Install Automatic Transmission Fluid Cooler - AR27.55-P-1000MNK

Transmission 725.0 in model 217, 222 with engine 176 

Example illustration 

Fig 1: Automatic Transmission Fluid Cooler Components Location - Transmission 725.0 In Model 222 With Engine 176
G15366976Courtesy of MERCEDES-BENZ USA
WARNING Risk of injury  . Skin or eye injuries may result when handling hot or glowing objects. Wear protective gloves, protective clothing and safety glasses, if necessary. AS00.00-Z-0002-01A
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  to skin and eyes due to handling of transmission oil. Health risk caused by swallowing transmission oil Wear protective gloves, protective clothing and safety glasses.
Do not pour transmission oil into beverage bottles.
AS00.40-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
  Notes on automatic transmission   AH27.19-P-0001-01NKB
REMOVINGINSTALLING Remove/install     
1 Remove fan unit INSTALLATION IMPORTANT Install front and lower center engine compartment lining only after leak test. AR20.40-P-5050MNL
2 Drain coolant from low-temperature circuit   AR09.41-P-6834MNL
3 Remove coolant hoses (11, 12) from oil cooler (1)   AR20.20-P-7441-01RQ
4 Seal connections of coolant hoses (11, 12) on oil cooler (1) with protective covers SPECIAL TOOL Set of protective covers Fig 2
5 Seal coolant hoses (11, 12) using protective covers SPECIAL TOOL Set of protective covers Fig 2
6 Detach oil lines (9, 10) from oil cooler (1) and remove oil cooler (1) in downward direction   AR27.10-P-0501-03LF
    SPECIAL TOOL Record plug Fig 3
7 Seal openings in oil cooler (1) using suitable stop plugs SPECIAL TOOL Record plug Fig 3
8 Install in the reverse order.    
INSPECT Check     
9 Check fluid level in automatic transmission and adjust to correct level   AR27.00-P-0270EWN
10 Check low-temperature circuit cooling system for leak tightness Transmission 725.0 in model 217, 222 with engine 176 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 engine test run and check oil lines (9, 10) and oil cooler (1) for leaks    
12 Install front and center engine compartment paneling   AR61.20-P-1105LF
Fig 2: Identifying Set Of Protective Covers (001 589 11 91 00)
G14786196Courtesy of MERCEDES-BENZ USA
Fig 3: Identifying Record Plug (129 589 00 91 00)
G12078802Courtesy of MERCEDES-BENZ USA