Location and assignment of ground points, engine compartment, left - GF00.19-P-2000-01SAA

Model 221 

Fig 1: Locating Engine Compartment Ground Points (Left)

Courtesy of MERCEDES-BENZ USA

Ground point	Designation	Component	Designation	Plug Pin
W3/2	Ground (left front wheelhouse)
	LHD, →05/09	→ E1	Left front headlamp unit	1.1
				1.3
	LHD, 06/09→	→ E1	Left front headlamp unit	5
				10
	RHD,→05/09	→ E2	Right front headlamp unit	1.1
				1.3
	RHD, 06/09→	→ E2	Right front headlamp unit	5
				10
	09/06→05/09, LHD	→ E5/1	Left front fog lamp	1
	09/06→ 05/09, RHD	→ E5/2	Right fog lamp	1
	RL	→ F32	Front prefuse	MR5.1
		→H2	Left fanfare horn	1
		→ M5/1	Windshield washer fluid pump	2
		→ M5/2	HCS [SRA] pump	2
	LHD	→ M6/6	Master wiper motor	3
	LHD	→ M6/7	Slave wiper motor	3
		→ M13	Heating water circulation pump	2
	RL	→ R2/10	Wiper rest heater	1
		→ R2/11	Washer nozzle hose heater	2
W9	Ground (left front, at lamp unit)
	M275	→ M4/7	Engine and AC electric suction fan with integrated control	1
	M276
	M157, M278
	M642
	Valid for engine 272.974	→ K109/1	Vacuum pump relay (-)	1.4
	M272
W11w1
		→ C4	Radio interference suppression capacitor	2.2
		→ T1/4	Cylinder 4 ignition coil	3
		→ T1/5	Cylinder 5 ignition coil	3
		→ T1/6	Cylinder 6 ignition coil	3
	M273
W11w1
		→ C4/2	Radio interference suppression capacitor 2	2
		→ T1/5	Cylinder 5 ignition coil	3
		→ T1/6	Cylinder 6 ignition coil	3
		→ T1/7	Cylinder 7 ignition coil	3
		→ T1/8	Cylinder 8 ignition coil	3
	M156
W11/1	Ground (engine - ground strap)	→ C4/1	Radio interference suppression capacitor 1	2
		→ T1/5	Cylinder 5 ignition coil	3
		→ T1/6	Cylinder 6 ignition coil	3
		→ T1/7	Cylinder 7 ignition coil	3
		→ T1/8	Cylinder 8 ignition coil	3
W11/3	Ground (engine, left)	→ W15/3	Ground (electronics)