Remove/Install Glow Plugs - AR15.20-P-4111OGR

Engine 642 in model 166, 292 

Fig 1: Glow Plugs Components Location - Engine 642 In Model 166

Courtesy of MERCEDES-BENZ USA

Shown on model 166 

	Risk of injury  due to fan starting unexpectedly	Do not reach into the rotation or hazard area of the fan. Wear closed and close-fitting work clothes.	AS20.40-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
	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
	Information on preventing damage to electronic components due to electrostatic discharge		AH54.00-P-0001-01A
	Notes on avoiding damage through contamination and foreign objects		AH00.00-P-5000-01A
	Notes for ceramic glow plugs		AH15.20-P-0001-01A
	Remove
1	Remove leak oil line bracket and place to one side		AR07.03-P-9105OGR
2	Detach engine wiring harness from left cylinder head cover and charge air distributor on right cylinder head, and press to side
3	Release and disconnect electrical connections of glow plugs (R9)	Pliers	Fig 4
4	Remove glow plugs (R9)	If release torque of glow plugs (R9) is greater than 25 Nm, bringing the engine to operating temperature is recommended. To prevent glow plugs (R9) from tearing off.
		Wrench socket	Fig 3
		Socket wrench	Fig 2
	Check
5	Check glow plug wells for contamination	Commercially available devices/tools  Cylinder brush, Perlon, Ø 6 mm Cylinder brush, Perlon, Ø 10 mm In the case of complaints. ↓ Clean glow plug wells.
	Install
6	Screw in glow plugs (R9)	Glow plug to cylinder head	*BA15.20-P-1001-01F
		Wrench socket	Fig 3
		Socket wrench	Fig 2
7	Connect electrical connections to glow plugs (R9)
8	Attach engine wiring harness for left cylinder head cover and charge air distributor	Replace removed cable ties.
9	Attach leak oil line bracket		AR07.03-P-9105OGR

Fig 2: Identifying Socket Wrench (001 589 78 09 00)

Courtesy of MERCEDES-BENZ USA

Fig 3: Identifying Wrench Socket (001 589 80 09 00)

Courtesy of MERCEDES-BENZ USA

Fig 4: Identifying Pliers (611 589 00 37 00)

Courtesy of MERCEDES-BENZ USA