Remove/Install Camshafts - AR05.20-P-6992MNA

Engine 176 in model 463 up to model year 2019 

Engine 177 in model 205 

Engine 178 in model 190 (except 190.381) 

Shown on ENGINE 177 

Fig 1: Camshafts Components Location - Engine 176 In Model 463 Up To Model Year 2019 (Shown On Engine 177)

Courtesy of MERCEDES-BENZ USA

Shown on ENGINE 177 

Courtesy of MERCEDES-BENZ USA

Fig 2: Camshaft Bearing Bridge Components Location - Engine 176 In Model 463 Up To Model Year 2019

Courtesy of MERCEDES-BENZ USA

Courtesy of MERCEDES-BENZ USA

	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  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
	Notes on avoiding damage through contamination and foreign objects		AH00.00-P-5000-01A
	Remove
1	Remove camshaft positioners (3) and holding devices.	Engine 176 in model 463 up to model year 2019 Engine 177 in model 205 Engine 178 in model 190 (except 190.381)	AR05.20-P-7204MNA
	Notes on application of flange sealants to seal major assemblies		AH00.00-P-0500-01MNE
		Holding device	Fig 4
		Holding device	Fig 3
2	Remove hold-down tools (2).
3	Remove camshafts (1).
	General information on checking camshafts and bearing points of camshafts		AH05.20-P-1000-09SZ
		Do not mount camshafts (1) on the segmented discs. Otherwise, damage to the camshafts (1) will occur.
4	Remove camshaft bearing bridges (7, 8).	Do not use sharp-edged tools. The sealing surfaces can be damaged otherwise.
	Clean
5	Clean sealing surfaces on the camshaft bearing bridges (7, 8).		AR01.00-P-0050-01A
		Loctite 7200	*BR00.45-Z-1038-04A
		Loctite 7063 (400 ml) cleaning spray	*BR00.45-Z-1046-04A
6	Clean sealing surfaces on the cylinder heads.		AR01.00-P-0050-01A
		Loctite 7200	*BR00.45-Z-1038-04A
		Loctite 7063 (400 ml) cleaning spray	*BR00.45-Z-1046-04A
	Check
7	Check bearing points on the camshafts (1) for wear and damage.	Commercially available devices/tools  Outside micrometer
		Diameter of camshaft bearing journal	*BE05.20-P-1001-03E
		Diameter of camshaft fitted bearing journal	*BE05.20-P-1002-03E
		If there are problems, ↓ Replace cylinder head or cylinder head cover.
		Left cylinder head Engine 176 in model 463 up to model year 2019 Engine 177 in model 205	AR01.30-P-5770MNA
	Left cylinder head Engine 178 in model 190 (except 190.381)		AR01.30-P-5770MNB
		Right cylinder head Engine 176 in model 463 up to model year 2019 Engine 177 in model 205	AR01.30-P-5780MNA
		Right cylinder head Engine 178 in model 190 (except 190.381)	AR01.30-P-5780MNB
		Left cylinder head cover Engine 176 in model 463 up to model year 2019 Engine 177 in model 205	AR01.20-P-5013MNA
		Left cylinder head cover Engine 178 in model 190 (except 190.381)	AR01.20-P-5013MNB
		Right cylinder head cover Engine 176 in model 463 up to model year 2019 Engine 177 in model 205	AR01.20-P-5012MNA
		Right cylinder head cover Engine 178 in model 190 (except 190.381)	AR01.20-P-5012MNB
8	Check cylinder heads and camshaft bearing bridges (7, 8) for damage.	If the cylinder heads or camshaft bearing bridges (7, 8) are damaged, ↓ replace respective cylinder head and camshaft bearing bridges (7, 8). (Obtainable only in combination)
		Left cylinder head Engine 176 in model 463 up to model year 2019 Engine 177 in model 205	AR01.30-P-5770MNA
		Left cylinder head Engine 178 in model 190 (except 190.381)	AR01.30-P-5770MNB
		Right cylinder head Engine 176 in model 463 up to model year 2019 Engine 177 in model 205	AR01.30-P-5780MNA
		Right cylinder head Engine 178 in model 190 (except 190.381)	AR01.30-P-5780MNB
		Left cylinder head cover Engine 176 in model 463 up to model year 2019 Engine 177 in model 205	AR01.20-P-5013MNA
		Left cylinder head cover Engine 178 in model 190 (except 190.381)	AR01.20-P-5013MNB
		Right cylinder head cover Engine 176 in model 463 up to model year 2019 Engine 177 in model 205	AR01.20-P-5012MNA
		Right cylinder head cover Engine 178 in model 190 (except 190.381)	AR01.20-P-5012MNB
9	Check bearing points on the cylinder head covers and cylinder heads for damage.	If there are problems, ↓ replace respective cylinder head or cylinder head cover.
		Left cylinder head cover Engine 176 in model 463 up to model year 2019 Engine 177 in model 205	AR01.20-P-5013MNA
		Left cylinder head cover Engine 178 in model 190 (except 190.381)	AR01.20-P-5013MNB
		Left cylinder head Engine 176 in model 463 up to model year 2019 Engine 177 in model 205	AR01.30-P-5770MNA
		Left cylinder head Engine 178 in model 190 (except 190.381)	AR01.30-P-5770MNB
		Right cylinder head cover Engine 176 in model 463 up to model year 2019 Engine 177 in model 205	AR01.20-P-5012MNA
		Right cylinder head cover Engine 178 in model 190 (except 190.381)	AR01.20-P-5012MNB
		Right cylinder head Engine 176 in model 463 up to model year 2019 Engine 177 in model 205	AR01.30-P-5780MNA
		Right cylinder head Engine 178 in model 190 (except 190.381)	AR01.30-P-5780MNB
	Install
10	Apply sealant to the camshaft bearing bridges (7, 8).
	Camshaft bearing bridge sealant path		GF05.20-P-6992-02MNA
		Sealant, Loctite 5970, 50 ml	*BR00.45-Z-1013-01A
11	Position camshaft bearing bridges (7, 8).	Bring camshafts (1) with camshaft bearing bridges (7, 8) into position. Otherwise, damage to the cylinder head and camshafts (1) will occur.
12	Install camshafts (1).
	Specified engine oils for Cars, Vans (service) - Overview		BB00.40-P-0223-02A
		Cams of camshafts (1) must point upwards at an angle after insertion at cylinder 5 so that cams of right and/or left cylinder bank point towards each other. Otherwise, the camshafts (1) will be damaged. The positions (arrows) of the camshafts (1) must always point upward. Wet compensating elements and camshaft bearing points with engine oil.
13	Install hold-down tools(2).	Screw/bolt, camshaft bearing cap to cylinder head	*BA05.20-P-1001-02C
14	Install camshaft positioners(3).	Only install upper engine cover and lower engine compartment paneling after the performing a leak test.	AR05.20-P-7204MNA
	Concluding tasks
15	Install lower engine compartment lining.	Engine 176 in model 463 up to model year 2019 Engine 177 in model 205 Engine 178 in model 190 (except 190.381)
		Engine 176 in model 463 as of model year 2016 up to model year 2019 except code ZQ0 (G 500 4x42 )	AR61.20-P-1105GW
		Engine 176 in model 463.234 up to model year 2019 with code ZQ0 (G 500 4x42 )	AR61.20-P-1105GWX
		Engine 177 in model 205	AR61.20-P-1105LW
		Engine 178 in model 190 (except 190.381)	AR61.20-P-1105RG
16	Check basic position of camshafts (1).	Secure vehicle to prevent it from starting off by	AR05.20-P-6010MNA
	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
17	Conduct engine test run while checking for proper operation of the engine.
18	Install upper engine cover.

Fig 3: Identifying Holding Device (177 589 01 40 00)

Courtesy of MERCEDES-BENZ USA

Fig 4: Identifying Holding Device (177 589 02 40 00)

Courtesy of MERCEDES-BENZ USA