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Home >> Mercedes Benz >> 2021 >> G63 AMG >> Repair and Diagnosis >> Transmission >> Transmission Control Systems >> Automatic Transmission - 463 Chassis >> Testing & Repair >> Remove/Install Automatic Transmission Fluid Cooler >> Remove/Install Automatic Transmission Fluid Cooler - AR27.55-P-1000XGA

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

Transmission 725.0 in model 463 with engine 176 

as of model year 2019 

Transmission 725.0 in model 463 with engine 264 

as of model year 2019 

Example illustration 

Fig 1: Automatic Transmission Fluid Cooler Components Location - Transmission 725.0 In Model 463 With Engine 176
G13657420Courtesy of MERCEDES-BENZ USA

Example illustration 

G13657421Courtesy 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 coolant spray.
Risk of poisoning  from swallowing coolant.
Do not open cooling system unless coolant temperature is below 90 °C. Open cap slowly and release the pressure. 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
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
  Notes on automatic transmission   AH27.19-P-0001-01NKB 
REMOVINGINSTALLING Remove/install     
1 Remove front lower engine compartment paneling. INSTALLATION IMPORTANT Only install front lower engine compartment paneling after leak test. AR61.20-P-1105XG
2 Remove oil lines (9, 10) from oil cooler (1). NOTES Do not kink or stretch oil lines.
Otherwise damage will occur.
AR27.10-P-0501-03GW 
    SPECIAL TOOL Record plug Fig 4
3 Seal openings in oil cooler (1) using suitable stop plugs. SPECIAL TOOL Record plug Fig 4
4 Close off coolant hoses (11, 12) using clamp. SPECIAL TOOL Clamp Fig 3
5 Remove coolant hoses (11, 12) from oil cooler (1).   AR20.20-P-7441-01RQ
    IMPORTANT Collect escaping coolant in suitable container.  
6 Seal off coolant hoses (11, 12) using protective covers. SPECIAL TOOL Set of protective caps Fig 2
7 Push retaining clip (8) upwards and remove oil cooler (1). NOTES Carefully push the retaining clip (8) upwards.
Otherwise the retaining clip (8) will be damaged.
If the retaining clip (8) is damaged,

secure oil cooler (1) at position marked by arrow using repair bolt (6) and washer (7).
 
8 Install in the reverse order.    
INSPECT Check     
9 Check and correct oil level in automatic transmission.   AR27.00-P-0270EWN 
10 Check low-temperature circuit cooling system for leak tightness. Transmission 725.0 in model 463 with engine 176 as of model year 2019 AR09.41-P-1011XGA
    Transmission 725.0 in model 463 with engine 264 as of model year 2019 AR20.00-P-1011MRO
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) for leak tightness.
Notes on evaluating leakages
  AH00.00-N-0011-01A
12 Install front lower engine compartment lining.   AR61.20-P-1105XG
Fig 2: Identifying Set Of Protective Caps (001 589 00 91 00)
G13657422Courtesy of MERCEDES-BENZ USA
Fig 3: Identifying Clamp (000 589 40 37 00)
G13657423Courtesy of MERCEDES-BENZ USA
Fig 4: Identifying Record Plug (129 589 00 91 00)
G13657424Courtesy of MERCEDES-BENZ USA