Disassemble/assemble suspension strut - AR32.25-P-1018RT

MODEL 251 except CODE (489) All-round level control system

Fig 1: Identifying Suspension Strut Disassemble/Assemble Components

Courtesy of MERCEDES-BENZ USA

	Remove
	Risk of death caused by vehicle slipping or toppling off of the lifting platform.	Align vehicle between the columns of the lifting platform and position the four support plates at the lifting platform support points specified by the vehicle manufacturer.	AS00.00-Z-0010-01A
	Risk of injury caused by pinching or crushing when working on springs or spring bodies that are under load	Use only approved tensioning devices; shield off hazard area if necessary. Inspect special tools for damage and proper operation (visual inspection). Wear protective gloves.	AS00.00-Z-0001-01A
	Notes on self-locking nuts and bolts	All models	AH00.00-N-0001-01A
	Note on adjusting vehicle level at the front axle	If the values are outside the tolerance during the measurement of vehicle level, the vehicle level must be adjusted. The following should be noted for this: The vehicle level is reduced by removing spacer rings or increased by adding spacer rings between the spring (7) and spring seat (12) If the spring seat (4) and/or spring (7) and/or shock absorber (11) have to be replaced after checking, then the suspension strut must first be installed in the vehicle without spacer rings and the vehicle level measured again. If the values are still outside tolerance after the renewed level measurement, the suspension strut must be removed again and the vehicle level adjusted.
1	Remove front suspension strut		AR32.25-P-1017RT
	Disassemble/assemble
2	Clamp the tensioning device (10) in the vise, insert clamping plate (8) and clamping plate (9)	Tensioning device	Figure
2		Clamping plates	Figure
3	Insert suspension strut into tensioning device (10)	Insert suspension strut to clamp as many coils on the spring (7) as possible.
4	Clamp spring (7) until the upper spring cup (3) is relieved of load.
5	Remove cap (1)
6	Unscrew mounting nut (2), remove shock absorber (11) and remove spacer rings from the spring (7) if necessary	Counterhold the piston rod using a wrench socket.
			*BA32.25-P-1003-01H
		Socket wrench	Figure
7	Remove bellows (6) and stop damper (5) from the spring (7)
8	Release tensioning device (10) and remove spring (7) with upper spring cup (3) and spring seat (4)	The tensioning device (10) must be tensioned and released using a fork wrench or ring wrench. No pneumatic or electrically driven tools may be used.
	Check
9	Check shock absorber (11)	Check shock absorber (11) for external damage, external or internal leaks, replace the shock absorber (11) if necessary	AR32.25-P-0121A
10	Check bellows (6), stop damper (5) and spring seat (4) for signs of wear	Replace any components with oil contamination, cracks or deformation.
	Adjust
11.1	Remove spacer rings between the spring (7) and lower spring seat (12) to reduce the vehicle level or add to increase the vehicle level	Only if the vehicle level is to be adjusted at the front axle without replacing the spring seat (4) and/or the spring (7) and/or the shock absorber (11). If the spring seat (4) and/or spring (7) and/or shock absorber (11) are replaced, all the spacer rings which may be present during removal must be left out.
12	Assemble in reverse order	Assemble the suspension strut so that the upper spring cup (3) is mounted in the right position. Observe markings.
	Install
13	Install front suspension strut, measure vehicle level, adjust if necessary		AR32.25-P-1017RT
	Adjust
14.1	Adjust the zero position of the xenon headlamps	Vehicles using bi-xenon headlamp unit with integrated curve illumination, code 615.
	Connect STAR DIAGNOSIS and read out fault memory		AD00.00-P-2000-04A
	Connect STAR DIAGNOSIS and read out fault memory	STAR DIAGNOSIS diagnosis system	*WH58.30-Z-1048-13A
15	Check headlamp setting and correct if necessary
	Check and correct headlamp adjustment		AP82.10-P-8260RT