Remove/install air pump switchover valve - AR14.30-P-7255GZS (ML63 AMG)

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ENGINE 156 in MODEL 164, 251

Fig 1: Identifying Air Pump Switchover Valve Components

Courtesy of MERCEDES-BENZ OF NORTH AMERICA.

	Remove/install
	Risk of injury caused by fingers being pinched or crushed when removing, installing or aligning hoods, doors, trunk lids, tailgates or sliding roof.	Keep body parts and limbs well clear of moving parts.	AS00.00-Z-0011-01A
	Notes on avoiding damage to electronic components due to electrostatic discharge	All models	AH54.00-P-0001-01A
1	Turn key in ignition switch to position "0".	On vehicles with Keyless Go, code 889: Press keyless go start/stop button repeatedly until ignition is switched off
2	Open engine hood	Model 164	AR88.40-P-1000GZ
		Model 251	AR88.40-P-1000RT
3	Remove front engine cover (1)	Do not tilt front engine cover, but lift upwards vertically otherwise retaining lugs can break off.
4	Disconnect pneumatic lines (2) at air pump switchover valve (Y32)	Never use pointed or sharp tools to remove pneumatic lines (2), otherwise these may be damaged. Check the pneumatic lines (2) for wear and damage; replace them if required.
5	Disconnect electrical connector (3) at air pump switchover valve (Y32)
6	Lift off the locking tab and pull off air pump switchover valve (Y32) from bracket
7	Install in the reverse order
8	Read out fault memory and erase if required	Stored faults which may be caused by disconnecting cables or by simulation during test operations, must be erased in the fault memory after completing the work.
	Connect STAR DIAGNOSIS and read out fault memory		AD00.00-P-2000-04A
		STAR DIAGNOSIS diagnostic system	*WE58.40-Z-1013-06A

WORKSHOP EQUIPMENT/MB TESTERS (SEE WORKSHOP EQUIPMENT MANUAL)

WE58.40-Z-1013-06A

STAR DIAGNOSIS Compact diagnosis system for passenger cars, order number 6511 1801 00