Remove/install glow plugs - AR15.20-P-4111CD

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ENGINES 651 in MODELS 166, 172, 204, 207, 212, 218, 221

Shown on engine 651.911

Fig 1: Glow Plugs Remove/Install Components - Shown On Engine 651.911 (1 Of 2)

Courtesy of MERCEDES-BENZ USA

Fig 2: Glow Plugs Remove/Install Components - Shown On Engine 651.911 (2 Of 2)

Courtesy of MERCEDES-BENZ USA

	Remove/install
	Notes for ceramic glow plugs		AH15.20-P-0001-01A
1	Remove cylinder head cover trim
2	Remove fuel filter	Lay fuel filter with attached fuel lines to one side.
		Model 204	AP47.20-P-0780CWD
		Model 166, 172, 207, 212, 218	AP47.20-P-0780EWD
		Model 221	AP47.20-P-0780SXI
3	Disconnect electrical connector (8)	Except models 166, 172
4	Disconnect electrical connectors (7)
5	Loosen fastening clip (9) and lift cable shaft (10) upwards	Cable holder which are separated when removing, must be fitted again at the same position when installing.
6	Detach electrical connectors (1) from glow plugs (R9) using pliers (2)	Pliers	Fig 4
7	Unscrew glow plugs (R9)	If the releasing torque of the glow plugs (R9) is greater than 25 Nm, it is recommended to bring the engine up to operating temperature. The glow plugs (R9) can tear off otherwise.
		Wrench socket	Fig 3
			*BA15.20-P-1001-01A
8	Clean glow plug well
9	Install in the reverse order

PREGLOW SYSTEM

Number	Designation		Engine 651
BA15.20-P-1001-01A	Glow plug on cylinder head	Nm	11

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

Courtesy of MERCEDES-BENZ USA

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

Courtesy of MERCEDES-BENZ USA