Remove/Install Timing Case Cover - AR01.40-P-8000MRD

Engine 274.9 in model 213 

Engine 274.9 in model 238 

Shown on engine 274.9 in model 213.050 

Fig 1: Timing Case Cover Components Location - Engine 274.9 In Model 213 (Shown In Model 213.050)

Courtesy of MERCEDES-BENZ USA

	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  to skin and eyes due to handling of engine oil. Risk of poisoning  caused by swallowing engine oil	Wear protective gloves, protective clothing and safety glasses. Do not fill engine oil into beverage containers.	AS18.00-Z-0001-01A
	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. Engine 274.9 in model 213.050	AS00.00-Z-0035-01A
NOTICE	General information on vehicles with high-voltage on-board electrical system and/or lithium-ion battery and/or gaseous-fuel drive system as well as personal protective equipment	Engine 274.9 in model 213.050	AH00.00-Z-0300-01A
NOTICE	Notes on avoiding damage through contamination and foreign objects		AH00.00-P-5000-01A
NOTICE	Notes on coolant		AH20.00-N-2080-01A
	Remove
1	Perform enable for the high voltage on-board electrical system	Engine 274.9 in model 213.050	AR54.10-P-1150LHV
2	Deactivate memory package over the COMAND operating unit	Engine 274.9 in model 213 with code 275 (Memory Package (driver's seat, steering column and mirror)) Engine 274.9 in model 238 with code 275 (Memory Package (driver's seat, steering column and mirror))
3	Turn front wheels to straight-ahead position and fix steering wheel in place with holding device	The steering wheel must not be turned for a separated steering coupling. Otherwise the clock spring contact will be destroyed.
		Retainer device	Fig 4
4	Disconnect ground line of battery	Engine 274.9 in model 238	AR54.10-P-0003LWO
		Engine 274.9 in model 213	AR54.10-P-0003LW
5	Secure vehicle on vehicle lift		AR00.60-P-0100CW
6	Drain off coolant		AR20.00-P-1142OLC
7	Remove air filter housing		AR09.10-P-1150MRD
8	Remove ATL heat shield		AR09.40-P-6036MRD
9	Remove charge air pipe between charge air cooler and ATL
10	Remove vibration damper		AR03.30-P-1800MRD
11.1	Remove poly-V belt tensioning device	Engine 274.9 in model 213 (except 213.050) Engine 274.9 in model 238	AR13.25-P-3220MRD
11.2	Remove screw (6)	Engine 274.9 in model 213.050
12	Remove upper guide pulley for poly-V belt	Engine 274.9 in model 213.048/049/148 Engine 274.9 in model 238.348/448
13.1	Remove A/C compressor from engine, place with attached lines to one side and secure against falling down	Engine 274.9 in model 213 (except 213.050) Engine 274.9 in model 238 Engine 274.9 in model 238	AR83.55-P-5310LWK
		Engine 274.9 in model 213 (except 213.050) except code ME06 (Hybrid drive 60 kW variant (incl. plugin))	AR83.55-P-5310LW
13.2	Remove electrical A/C compressor from engine, place with attached lines to one side and secure against falling down	Engine 274.9 in model 213.050	AR83.55-P-5311LHV
14	Remove oil pan (3)		AR01.45-P-7500MRD
15	Detach coolant line between charge air cooler and low-temperature cooler from timing case cover (2)
16.1	Remove alternator from engine, place with attached lines to one side and secure against falling down	Engine 274.9 in model 213 (except 213.050) Engine 274.9 in model 238	AR15.40-P-5032MRD
16.2	Remove electric vacuum pump from engine, place with attached lines to one side and secure against falling down	Engine 274.9 in model 213.050	AR43.05-P-0001MRD
17.1	Remove electric coolant pump	Engine 274.9 in model 213 (except 213.048/049/148) Engine 274.9 in model 238 (except 238.348/448)	AR20.10-P-1281MRD
17.2	Remove mechanical coolant pump	Engine 274.9 in model 213.048/049/148 Engine 274.9 in model 238.348/448	AR20.10-P-1271MRD
18	Remove coolant hose between coolant pump and coolant thermostat	Hose clamp pliers	Fig 2
19	Remove coolant line	Engine 274.9 in model 213 (except 213.048/049/148) Engine 274.9 in model 238 (except 238.348/448)	AR20.20-P-7450MRD
20	Remove boost pressure control pressure transducer		AR07.17-P-7004MRD
21	Remove bracket for boost pressure control pressure transducer
22	Release and disconnect electrical connection (7)
23	Push out electrical connection (8) from timing case cover (2)
24	Remove screws (5)
25	Remove oil lines	Engine 274.9 in model 213.048/049/148 Engine 274.9 in model 238.348/448	AR18.30-P-6850MRD
26	Remove screws of heat exchanger connecting flange, and remove heat exchanger connecting flange	Engine 274.9 in model 213.048/049/148 Engine 274.9 in model 238.348/448
27	Remove screws (1) opposite to the tightening sequence	Bolt plan for timing case cover	AR01.40-P-8000-01MR
28	Remove timing case cover (2)	Do not hammer in a tool to pry off between timing case cover (2) and cylinder crankcase. The sealing surfaces can be damaged otherwise.
	Install
29	Clean sealing surfaces	Do not use any sharp-edged tools or abrasive paper. The sealing surfaces can be damaged otherwise.	AR01.00-P-0050-01A
		Loctite 7200	*BR00.45-Z-1038-04A
		Loctite 7063 (400 ml) cleaning spray	*BR00.45-Z-1046-04A
30	Apply sealant to timing case cover (2) Notes on sealant path for timing case cover		AH01.40-P-1000-01MR
		Sealant, Loctite 5970, 50 ml	*BR00.45-Z-1013-01A
		Application gun	Fig 3
31	Install timing case cover (2)
32	Screw in and tighten screws (1)	Bolt plan for timing case cover	AR01.40-P-8000-01MR
		Bolt, timing case cover to crankcase	*BA01.40-P-1001-01K
33	Install new cap (4)	When replacing timing case cover (2).
34	Install a new front crankshaft radial shaft sealing ring		AR03.20-P-3004MRD
35	Install heat exchanger connecting flange	Engine 274.9 in model 213.048/049/148 Engine 274.9 in model 238.348/448
		Screw/bolt, oil cooler connecting flange to timing case/crankcase	*BA18.30-P-1003-01L
36	Install oil lines	Engine 274.9 in model 213.048/049/148 Engine 274.9 in model 238.348/448	AR18.30-P-6850MRD
37	Screw in screws (5) and tighten them	Bolt, cylinder head to timing case cover	*BA01.30-P-1002-01Y
38	Pull electrical connection (8) with new sealing ring into timing case cover (2)
39	Connect and lock electrical connector (7)
40	Install bracket for boost pressure control pressure transducer	M6 X 1	*BA00.10-P-1002-04A
41	Install boost pressure control pressure transducer		AR07.17-P-7004MRD
42	Install coolant line	Engine 274.9 in model 213 (except 213.048/049/148) Engine 274.9 in model 238 (except 238.348/448)	AR20.20-P-7450MRD
43	Install coolant hose between coolant pump and coolant thermostat	M6 X 1	*BA00.10-P-1002-04A
		Hose clamp pliers	Fig 2
44.1	Install electric coolant pump	Engine 274.9 in model 213 (except 213.048/049/148) Engine 274.9 in model 238 (except 238.348/448)	AR20.10-P-1281MRD
44.2	Install mechanical coolant pump	Engine 274.9 in model 213.048/049/148 Engine 274.9 in model 238.348/448	AR20.10-P-1271MRD
45.1	Fasten alternator to engine	Engine 274.9 in model 213 (except 213.050) Engine 274.9 in model 238	AR15.40-P-5032MRD
45.2	Fasten electrical vacuum pump to engine	Engine 274.9 in model 213.050	AR43.05-P-0001MRD
46	Fasten coolant line between charge air cooler and low temperature cooler to timing case cover (2)	M6 X 1	*BA00.10-P-1002-04A
47	Install oil pan (3)		AR01.45-P-7500MRD
48.1	Attach A/C compressor to engine	Engine 274.9 in model 213 (except 213.050) Engine 274.9 in model 238 Engine 274.9 in model 238	AR83.55-P-5310LWK
		Engine 274.9 in model 213 (except 213.050) except code ME06 (Hybrid drive 60 kW variant (incl. plugin))	AR83.55-P-5310LW
48.2	Attach electrical A/C compressor to engine	Engine 274.9 in model 213.050	AR83.55-P-5311LHV
49	Install upper guide pulley for poly-V belt	Engine 274.9 in model 213.048/049/148 Engine 274.9 in model 238.348/448 Bolt, guide pulley to alternator	*BA13.25-P-1004-01Z
50.1	Install clamping device for poly-V belt	Engine 274.9 in model 213 (except 213.050) Engine 274.9 in model 238	AR13.25-P-3220MRD
50.2	Screw in screw (6) and tighten	Engine 274.9 in model 213.050 Bolt, timing case cover to crankcase	*BA01.40-P-1001-01K
51	Install vibration damper		AR03.30-P-1800MRD
52	Install charge air pipe between charge air cooler and ATL	M6 X 1	*BA00.10-P-1002-04A
53	Install ATL heat shield		AR09.40-P-6036MRD
54	Install air filter housing	Only install upper engine cover after the leak test.	AR09.10-P-1150MRD
55	Fill in coolant	Only install lower engine compartment paneling after leak test.	AR20.00-P-1142OLC
56	Remove locking clip from vehicle on vehicle lift		AR00.60-P-0100CW
57	Remove holding device of steering wheel	Retainer device	Fig 4
58	Connect ground line to battery	Engine 274.9 in model 238	AR54.10-P-0003LWO
		Engine 274.9 in model 213	AR54.10-P-0003LW
59	Check engine oil level and correct
			AP18.00-P-1811MP
	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
60	Perform an engine test run and check engine for proper operation and leak tightness
61	Install lower engine compartment paneling		AR61.20-P-1105LWE
62	Install upper engine cover

Fig 2: Identifying Hose Clamp Pliers (003 589 03 37 00)

Courtesy of MERCEDES-BENZ USA

Fig 3: Identifying Application Gun (112 589 00 25 00)

Courtesy of MERCEDES-BENZ USA

Fig 4: Identifying Retainer Device (129 589 01 21 00)

Courtesy of MERCEDES-BENZ USA