Remove/Install Oil Lines Of Oil Cooling For Automatic Transmission - AR27.55-P-0600GQ

Transmission 722.9 in model 166, 292 

Transmission 724.2 in model 166 

Transmission 725.0 in model 166 

Transmission 725.0 in model 292 

Shown on engine 276.8 

Courtesy of MERCEDES-BENZ USA

Shown on engine 276.9 

Fig 1: Oil Lines Of Oil Cooling For Automatic Transmission Components Location - Transmissions 722.9 And 725.0 In Model 166 (Shown On Engine 276.9)

Courtesy of MERCEDES-BENZ USA

Courtesy of MERCEDES-BENZ USA

	Risk of death  caused by vehicle slipping or toppling off of the lifting platform.	Align vehicle between vehicle lift columns and position the four support plates at the vehicle lift support points specified by the vehicle manufacturer.	AS00.00-Z-0010-01A
	Notes on self-locking nuts and bolts		AH00.00-N-0001-01A
	Notes on automatic transmission		AH27.19-P-0001-01NKB
	Remove/install
1	Clean connecting points of oil lines (2, 2a, 6)
2	Remove center and rear section of underfloor paneling		AR61.30-P-1001GQ
		Only install center and rear section of underfloor paneling after leak test.
3	Detach temperature sensor upstream of diesel particulate filter and place to one side	Transmission 722.9 in model 166 with engine 642 Transmission 722.9 in model 166 with engine 651
		Transmission 725.0 in model 166, 292 with engine 642	AR07.04-P-0005OGR
4.1	Remove engine air intake duct upstream of air filter housing	Transmission 722.9 in model 166 with engine 276.9 Transmission 722.9 in model 166 with engine 651 Transmission 722.9 in model 166, 292 with engine 642 Transmission 725.0 in model 166, 292 with engine 642
4.2	Remove right engine air intake duct upstream of air filter housing	Transmission 722.9 in model 166, 292 with engine 157 Transmission 722.9 in model 166, 292 with engine 276.8 Transmission 722.9 in model 166, 292 with engine 278 Transmission 724.2 in model 166 with engine 276.8 Transmission 725.0 in model 292 with engine 276.8 Transmission 725.0 in model 292 with engine 278
		Transmission 722.9 in model 166 with engine 276.8	AR09.10-P-1150GQC
5.1	Detach front oil lines (2) from oil cooler (1)	Transmission 722.9 in model 166 with engine 276.9 Transmission 722.9 in model 166 with engine 651 Transmission 722.9 in model 166, 292 with engine 157 Transmission 722.9 in model 166, 292 with engine 278 Transmission 722.9 in model 166, 292 with engine 642 Transmission 725.0 in model 292 with engine 278 Transmission 725.0 in model 292 with engine 642
		Transmission 725.0 in model 292 with engine 278, Transmission 725.0 in model 166, 292	AR27.10-P-0501-03LF
		Transmission 725.0 in model 292 with engine 642
		Transmission 722.9 in model 166 with engine 276.9	AR27.10-P-0501-03RT
		Transmission 722.9 in model 166 with engine 651 Transmission 722.9 in model 166, 292 with engine 157 Transmission 722.9 in model 166, 292 with engine 278 Transmission 722.9 in model 166, 292 with engine 642
		Do not kink or bend the front oil line (2). Leaks and damage can otherwise occur.
		Always disconnect/connect the feed line with the white marker ring (2w) from/to the upper transmission cooler connection; always disconnect/connect the return line with the black marker ring (2s) from/to the lower transmission cooler connection. Collect escaping transmission oil using a suitable container and seal connection fitting with stop plug.
		Record plug	Fig 2
5.2	Detach front oil line (2) at top of oil cooler (1) and at bottom of radiator (8)	Transmission 722.9 in model 166, 292 with engine 276.8 Transmission 724.2 in model 166 with engine 276.8 Transmission 725.0 in model 166 with engine 642 Transmission 725.0 in model 292 with engine 276.8
		Transmission 724.2 in model 166 with engine 276.8	AR27.40-P-0700-01GZ
		Transmission 725.0 in model 166 with engine 642 Transmission 725.0 in model 166, 292	AR27.10-P-0501-03LF
		Transmission 725.0 in model 292 with engine 276.8
		Transmission 722.9 in model 166, 292 with engine 276.8	AR27.10-P-0501-03RT
		Do not kink or bend the front oil line (2). Leaks and damage can otherwise occur. Collect escaping transmission oil using a suitable container and seal connection fitting with stop plug.
		Record plug	Fig 2
6	Detach oil line (2a) from oil cooler (1) and from radiator (8) and remove	Transmission 722.9 in model 166, 292 with engine 276.8 Transmission 724.2 in model 166 with engine 276.8 Transmission 725.0 in model 292 with engine 276.8
		Transmission 724.2 in model 166 with engine 276.8 Transmission 725.0 in model 166, 292	AR27.10-P-0501-03LF
		Transmission 725.0 in model 292 with engine 276.8
		Transmission 722.9 in model 166, 292 with engine 276.8	AR27.10-P-0501-03RT
		Do not kink or bend the oil line (2a). Leaks and damage can otherwise occur.
		Collect escaping transmission oil using a suitable container and seal connection fitting with stop plug.
		Record plug	Fig 2
7.1	Unclip front oil lines (2) on fan unit (3) (arrows)	Transmission 722.9 in model 166 with engine 157 Transmission 722.9 in model 166 with engine 276.9 Transmission 722.9 in model 166 with engine 278 Transmission 722.9 in model 166 with engine 642 Transmission 722.9 in model 166 with engine 651 Transmission 725.0 in model 166 with engine 642 Transmission 725.0 in model 292 with engine 278 Transmission 725.0 in model 292 with engine 642
7.2	Unclip upper front oil lines (2) from radiator (8) (arrow A)	Transmission 722.9 in model 166, 292 with engine 276.8 Transmission 724.2 in model 166 with engine 276.8 Transmission 725.0 in model 166, 292 with engine 276.8
8	Detach front oil lines (2) from bracket (4a)	Transmission 722.9 in model 166 Transmission 724.2 in model 166
		Transmission 724.2 in model 166 Bolt, oil line bracket to oil pan	*BA27.10-P-1011-04G
		Transmission 722.9 in model 166 Screw, oil cooler oil line to oil pan	*BA27.55-P-1003-01D
9	Detach front oil lines (2) from thermostat (5) and remove	Transmission 724.2 in model 166 Transmission 725.0 in model 166, 292	AR27.10-P-0501-03LF
		Transmission 722.9 in model 166	AR27.10-P-0501-03RT
		Transmission 722.9 in model 292
		Collect escaping transmission oil in a suitable container and seal connection fitting using stop plug.
		Record plug	Fig 2
10	Detach rear oil lines (6) from bracket (4b)	Do not kink or bend the rear oil lines (6). Leaks and damage can otherwise occur.
		Transmission 724.2 in model 166 Bolt, oil line clamp	*BA27.10-P-1026-04G
		Transmission 722.9 in model 166, 292	*BA27.55-P-1004-01D
		Transmission 725.0 in model 166, 292 Bolt, clamp to oil line
11	Detach rear oil lines (6) from transmission	Transmission 724.2 in model 166, Transmission 725.0 in model 166, 292	AR27.10-P-0501-03LF
		Transmission 725.0 in model 166, 292
		Transmission 722.9 in model 166, 292	AR27.10-P-0501-03RT
		Collect escaping transmission oil in a suitable container and seal connection fitting using stop plug.
		Install new seals.
		Transmission 724.2 in model 166 Bolt, bracket for oil line to transmission	*BA27.10-P-1010-04G
		Transmission 722.9 in model 166, 292 Transmission 725.0 in model 166, 292 Bolt, oil line to transmission housing	*BA27.55-P-1002-01D
		Record plug	Fig 2
12	Detach rear oil lines (6) from thermostat (5) and remove	Transmission 724.2 in model 166 Transmission 725.0 in model 166, 292	AR27.10-P-0501-03LF
		Transmission 722.9 in model 166, 292	AR27.10-P-0501-03RT
		Collect escaping transmission oil in a suitable container and seal connection fitting using stop plug.
		Record plug	Fig 2
13	Unscrew bolt (7) and remove thermostat (5)	Detach the bracket from the thermostat (5) if necessary.
		Transmission 722.9 in model 166, 292 Transmission 725.0 in model 166, 292 Bolt, thermostat to bracket	*BA27.55-P-1012-01D
		Transmission 722.9 in model 166, 292 Bolt, bracket for thermostat to oil pan	*BA27.55-P-1011-01D
14	Install in the reverse order
15	Check transmission oil level and correct if necessary	Transmission 722.9 (except 722.96/97) in model 166, 292	AR27.00-P-0270W
		Follow the prescribed work procedure exactly and observe the Specifications for Operating Fluids. The transmission will otherwise be damaged.
	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
16	Test run engine and check transmission for leaktightness and proper operation
17	Install center and rear section of underfloor paneling		AR61.30-P-1001GQ

Fig 2: Identifying Record Plug (129 589 00 91 00)

Courtesy of MERCEDES-BENZ USA