(Remove/Install Fan Unit - AR20.40-P-5050OIB)

Engine 654, 656 in Model 257 

Engine 656 in Model 213, 238 

Shown on Model 257 with engine 656 

Courtesy of MERCEDES-BENZ USA

Shown on Model 257 with engine 656 

Courtesy of MERCEDES-BENZ USA

Courtesy of MERCEDES-BENZ USA

	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
	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 avoiding damage through contamination and foreign objects		AH00.00-P-5000-01A
	Notes on self-locking nuts and bolts		AH00.00-N-0001-01A
	Information on preventing damage to electronic components due to electrostatic discharge		AH54.00-P-0001-01A
	General information on riveting		AH60.00-P-0003-01N
	Remove/install
1	Remove top engine covers (2).	Engine 656 in Model 213, 238, 257	AR01.10-P-2405OIB
		Engine 654 in Model 257	AR01.10-P-2405OLC
		: Only install upper engine cover after the leak test.
2	Remove engine air intake duct (3).
3	Remove retaining clips and cold air intake (4).	Clip remover	Fig 2
4	Drill out rivets (15) of the supports (16) of the front bumper on the crossmember (6).	Engine 654, 656 in Model 257
		Blind rivet 6.4X12 (clamping range 1 mm to 3.5 mm, draw-off strength min. 15.5 kN)	*BR00.45-Z-1035-13A
5	Remove screws (14) of the supports (16) of the front bumper.	Engine 654, 656 in Model 257
			AR88.20-P-2000FR
6	Remove screws (5) and remove crossmember (6).	Bolt, lock striker to cross member/front-module carrier	*BA62.30-P-1008-01H
		M6X1	*BA00.10-P-1002-04A
		M8X1	*BA00.10-P-1004-04A
7	Release and disconnect electrical connector from fan unit (1).
8	Unclip bracket (9) from fan unit (1).
9	Unclip coolant line (8) from fan unit (1).
10	Drain off coolant.		AR20.00-P-1142OIB
11	Unclip top cold air guide from fan unit (1).
12	Remove coolant hoses (10, 11) from cooler and seal openings with protective covers.		AR20.20-P-7441-01RQ
		Set of protective covers	Fig 1
13	Remove coolant filling hose (12) from the cooler and seal openings with protective covers.		AR20.20-P-7441-01RQ
		Set of protective covers	Fig 1
14	Remove bleed line (13) from the cooler and seal openings with protective covers.		AR20.20-P-7441-01RQ
		Set of protective covers	Fig 1
15	Unclip fan unit (1) from the cooler mounts and remove upward.
16	Install in the reverse order.
	Concluding tasks
17	Read out fault memory; clear fault memory if necessary.
		Model 238 with engine 656	AD00.00-P-2000-06LWO
		Model 213 with engine 656	AD00.00-P-2000-04B
		Model 257 with engine 654, 656	AD00.00-P-2000-06FR
	Check
18	Check engine cooling system for leak tightness.		AR20.00-P-1010OIB
	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
19	Carry out engine test run and check engine for proper leak tightness and leak tightness.
20	Install top engine covers (2).	Engine 656 in Model 213, 238, 257	AR01.10-P-2405OIB
		Engine 654 in Model 257	AR01.10-P-2405OLC

Fig 1: Identifying Set Of Protective Covers (001 589 01 91 00)

Courtesy of MERCEDES-BENZ USA

Fig 2: Identifying Clip Remover (452 589 01 63 00)

Courtesy of MERCEDES-BENZ USA