Remove/Install Engine Oil Line - AR18.30-P-6850GQC

Engine 276.8 in model 166, 251, 292 

Shown on model 166 with engine 276.8 

Fig 1: Engine Oil Line Components Location - Engine 276.8 In Model 166

Courtesy of MERCEDES-BENZ USA

	Risk of death  when working on component parts and systems with U >= 30 V alternating voltage (AC) or U >= 60 V direct voltage (DC)	Do not touch damaged or defective live component parts and lines or non-insulated electrical connections and lines.	AS00.00-Z-0035-01A
	General information on handling vehicles with high-voltage on-board electrical system and/or lithium-ion battery and/or gaseous-fuel drive system		AH00.00-Z-0300-01A
	Notes on battery		AH54.10-P-0001-01A
	Remove/install
1	Perform enable for the high voltage on-board electrical system	Engine 276.8 in model 166.063 When removing the left oil line return flow (2L).
			AR54.10-P-1150GQA
2	Remove partition wall between wheel wells	Engine 276.8 in model 251
			AR62.30-P-2400RT
3	Remove upper engine cover
4	Remove left-hand air filter housing	When removing the left oil line feed line (1L).
			AR09.10-P-1150GQC
5	Remove right air filter housing	When removing the right oil line feed line (1R)
			AR09.10-P-1150GQC
6	Remove left intake air duct upstream of air filter	When removing the left oil line return flow (2L)
			AR09.10-P-1150GQC
7	Remove right intake air duct upstream of air filter	When removing the right oil line return flow (2R).
			AR09.10-P-1150GQC
8	Detach charge air cooler with attached lines and coolant hoses and place to one side	For removal of the left return flow oil line (2L) and the right return flow oil line (2R).
			AR09.41-P-6819GQC
9	Detach alternator (G2) and place to one side with the lines connected	Engine 276.8 in model 166 (except 166.063), 251, 292 When removing the right oil line return flow (2R).
			AR15.40-P-5032GQ
10	Detach refrigerant compressor (A9) and lay down to side with connected lines	Engine 276.8 in model 166 (except 166.063), 251, 292 When removing the left oil line return flow (2L)
		Engine 276.8 in model 166 (except 166.063), 292	AR83.55-P-5300GQ
		Screw/bolt, refrigerant compressor to timing case/crankcase/engine support	*BA83.55-P-1001-01M
11	Detach electrical A/C compressor and lay down to the side with connected lines	Engine 276.8 in model 166.063 When removing the left oil line return flow (2L)	AR83.55-P-5311GQA
		Screw/bolt, refrigerant compressor to timing case/crankcase/engine support	*BA83.55-P-1001-01M
12	Remove left soundproofing on rail	Engine 276.8 in model 166, 251, 292 (except 292.364) When removing the left oil line feed line (1L).
13	Remove soundproofing on rail	Engine 276.8 in model 166, 251, 292 (except 292.364) When removing the right oil line feed line (1R)
14	Detach left oil lines feed line (1L) from ATL and crankcase, remove upwards and close off with grommet	When removing the left oil line feed line (1L).
		Install new sealing rings.
		Bolt, oil feed line to turbocharger	*BA09.40-P-1004-01W
		Bolt, oil feed line to cylinder head	*BA09.40-P-1005-01W
		Record plug	Fig 2
15	Detach right oil lines feed line (1R) from ATL and crankcase, remove upwards and close off with grommet	When removing the right oil line feed line (1R).
		Install new sealing rings.
		Bolt, oil feed line to turbocharger	*BA09.40-P-1004-01W
		Bolt, oil feed line to cylinder head	*BA09.40-P-1005-01W
		Record plug	Fig 2
16	Detach left oil lines return line (2L) from ATL and crankcase, remove upwards and close off with grommet	When removing the left oil line return flow (2L)
		Install new sealing rings.
		Bolt, oil return flow line to turbocharger	*BA09.40-P-1006-01W
		Bolt, oil return line to crankcase	*BA09.40-P-1007-01W
		Record plug	Fig 2
17	Detach right oil lines return line (2R) from ATL and crankcase, remove upwards and close off with grommet	When removing the right oil line return flow (2R).
		Install new sealing rings.
		Bolt, oil return flow line to turbocharger	*BA09.40-P-1006-01W
		Bolt, oil return line to crankcase	*BA09.40-P-1007-01W
		Record plug	Fig 2
18	Install in the reverse order
	Check
19	Check engine oil level; correct if necessary
		Engine 276.8 in model 166, 292	AP18.00-P-0101GQ
		Engine 276.8 in model 251	AP18.00-P-0101W
	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
20	Carry out an engine test run, checking the engine for proper operation and leaktightness

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

Courtesy of MERCEDES-BENZ USA