Remove/Install Automatic Transmission Oil Cooler - AR27.55-P-1000OLI

Transmission 725.0 in model 205, 253 with engine 264 

Transmission 725.0 in model 205, 253 with engine 654 

Transmission 725.0 in model 253 with engine 656 

Shown on automatic transmission 725.0 in model 205 with engine 654 except code ME05 (Hybrid drive 85 kW-94 kW variant (incl. plug-in)) 

Fig 1: Automatic Transmission Oil Cooler Components Location - Transmission 725.0 In Model 253 With Engine 264 (Shown On Model 205)

Courtesy of MERCEDES-BENZ USA

	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
	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
	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
	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
	Notes on automatic transmission		AH27.19-P-0001-01NKB
	Remove/install
1	Remove center and rear engine compartment lining.	Only center and rear engine compartment paneling after a leaktightness test.	AR61.20-P-1105LW
2	Detach oil lines (2, 3) from oil cooler (1).		AR27.10-P-0501-03LF
		Assembly cleaner	*BR00.45-Z-1028-04A
		Record plug	Fig 3
3	Pinch off coolant hoses using pinch-off pliers.	Commercially available devices/tools  Pinch-off pliers
4	Remove coolant hoses at oil cooler (1).		AR20.20-P-7441-01RQ
5	Seal connections of coolant hoses at oil cooler (1) with protective covers.	Set of protective caps	Fig 2
6	Seal coolant hoses with protective covers.	Set of protective caps	Fig 2
7	Remove screws (4) and remove oil cooler (1).	Bolt, oil cooler to transmission	*BA27.55-P-1018-01D
8	Install in the reverse order.
	Check
9	Check oil level in automatic transmission and correct if necessary.	Transmission 725.017 in model 205 with engine 654 Transmission 725.047 in model 253 with engine 654	AR27.00-P-0270EWH
		Transmission 725.0 (except 725.017/047) in model 205, 253 with engine 654 Transmission 725.0 in model 205, 253 with engine 264 Transmission 725.0 in model 253 with engine 656	AR27.00-P-0270EWN
10	Check engine cooling system for leak tightness.		AR20.00-P-1010LW
	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 cooler (1) for leak tightness.
12	Install center and rear engine compartment lining.		AR61.20-P-1105LW

Fig 2: Identifying Set Of Protective Caps (001 589 00 91 00)

Courtesy of MERCEDES-BENZ USA

Fig 3: Identifying Record Plug (129 589 00 91 00)

Courtesy of MERCEDES-BENZ USA