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Home >> Mercedes Benz >> 2021 >> G63 AMG >> Repair and Diagnosis >> Engine Mechanical >> Cooling System (Mechanical) >> Engine Cooling System - 463 Chassis >> Testing & Repair >> Remove/Install Fan Unit >> Remove/Install Fan Unit - AR20.40-P-5050XGA

Remove/Install Fan Unit - AR20.40-P-5050XGA

Engine 176 in model 463 

as of model year 2019 

Fig 1: Fan Unit Components Location - Engine 176 In Model 463 As Of Model Year 2019
G13656844Courtesy 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 pressure. Do not pour coolant into beverage containers.
Wear protective gloves, protective clothing and safety glasses.
AS20.00-Z-0001-01A 
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
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
  Information on preventing damage to electronic components due to electrostatic discharge   AH54.00-P-0001-01A
  Notes on coolant   AH20.00-N-2080-01A 
  Notes on avoiding damage through contamination and foreign objects   AH00.00-P-5000-01A
REMOVINGINSTALLING Remove/install     
1 Switch off ignition and store transmitter key outside of transmitter range (min. 2 m).    
2 Remove cold air intake.   AR09.00-P-0002XGA
3 Remove left and right air intake lines to left and right air filter housings.    
4 Remove center air intake line on air duct segment of cold air intake.   AR09.10-P-0002XGA
5 Drain off coolant. INSTALLATION IMPORTANT Only install lower engine compartment paneling after leak test. AR20.00-P-1142XGA 
6 Actuate bracket (6) and remove oil cooler (7) from fan unit (1).    
7 Release and disconnect electrical connector (2) on fan unit (1).    
8 Remove bleed line (3) on cooler and seal openings with suitable stop plugs.   AR20.20-P-7441-01RQ 
    SPECIAL TOOL Record plug Fig 3
9 Remove coolant hose (8) from cooler and seal opening with protective covers.   AR20.20-P-7441-01RQ 
    SPECIAL TOOL Set of protective caps Fig 2
10 Actuate brackets (9), unhook fan unit (1) from cooler and remove in upward direction.    
11
REFER TO SHOP-MADE TOOLS
Mount protective plate on cooler. When performing subsequent work in engine compartment. WF58.50-P-0110-01A
12 Install in the reverse order.    
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
13 Carry out engine test run and check engine for proper leaktightness and leaktightness.    
14 Install lower engine compartment lining.   AR61.20-P-1105XG
Fig 2: Identifying Set Of Protective Caps (001 589 00 91 00)
G13656845Courtesy of MERCEDES-BENZ USA
Fig 3: Identifying Record Plug (129 589 00 91 00)
G13656846Courtesy of MERCEDES-BENZ USA