Remove/install intelligent servo module - AR27.19-P-0550GQ

TRANSMISSION 722.9 in MODEL 166 

Shown on model 166 with 4MATIC 

Fig 1: Identifying Intelligent Servo Module Remove/Install Components - Shown On Model 166 (1 Of 2)

Courtesy of MERCEDES-BENZ USA

Fig 2: Identifying Intelligent Servo Module Remove/Install Components - Shown On Model 166 (2 Of 2)

Courtesy of MERCEDES-BENZ USA

	Risk of death  caused by vehicle slipping or toppling off of the lifting platform.	Align vehicle between vehicle lift columns and position the four support plates at the vehicle lift support points specified by vehicle manufacturer.	AS00.00-Z-0010-01A
	Information on preventing damage to electronic components due to electrostatic discharge		AH54.00-P-0001-01A
	Notes on bolted connections with self tapping screws		AH00.00-P-0007-01SF
	Notes on self-locking nuts and bolts		AH00.00-N-0001-01A
1	Release parking brake
2	Detach ground line from battery		AR54.10-P-0003GZ
	Notes on battery		AH54.10-P-0001-01A
3	Remove respective section of the underfloor paneling		AR61.30-P-1001GQ
4	Remove rear propeller shaft at output flange to rear axle from transfer case, place to one side and fix in place	TRANSMISSION 722.9 in MODEL 166 with 4MATIC with ENGINE 276 TRANSMISSION 722.9 in MODEL 166 with ENGINE 642
			AR41.10-P-0050-17GZ
		Mark the position of the rear propeller shaft on the output flange. Observe the tightening procedure for the rear propeller shaft.
		Self-locking bolt for propeller shaft on transfer case (to rear axle)	*BA41.10-P-1001-01F
		Retainer wrench	Figure
5	Remove front propeller shaft at output flange to front axle from transfer case, place to one side and fix in place	Only with 4MATIC
			AR41.10-P-0070-03GZ
		Mark the position of the front propeller shaft on the output flange. Observe tightening procedure for front propeller shaft.
		Self-locking bolt, propeller shaft to transfer case (to front axle)	*BA41.10-P-1003-01F
		Retainer wrench	Figure
6	Remove rear engine crossmember	TRANSMISSION 722.9 in MODEL 166 with 4MATIC with ENGINE 276 TRANSMISSION 722.9 in MODEL 166 with ENGINE 642
			AR22.10-P-1180GQ
7	Open clips (A) of vent hose (2) on transmission housing	Do not cause irreparable damage to the clips (A). Correct routing of the vent hose (2) can otherwise no longer be guaranteed. Lower  the drivetrain only far enough  to allow the clips (A) on the vent hose (2) to be accessed.
8	Disconnect electrical connection (3a) from intelligent servo module for DIRECT SELECT (A80)
9	Remove screws/bolts (4) from intelligent servo module for DIRECT SELECT (A80)	Standard bolt/hexagon-spacer bolt, shift module (ISM) to transmission housing	*BA27.40-P-1021-01A
10	Remove intelligent servo module for DIRECT SELECT (A80) to the rear
11	Remove intelligent servo module for DIRECT SELECT (A80) with bleed hose (2).	The positions of the range selector shaft (3) and the intelligent servo module for DIRECT SELECT (A80) must match. When reusing the removed intelligent servo module DIRECT SELECT (A80), do not detach the vent hose. A connecting point that is not tight can cause water to enter.
12.1	Turn range selector shaft (3) of transmission clockwise up to end stop at position "P"	When reusing the removed intelligent servo module for DIRECT SELECT (A80) Intelligent servo module for DIRECT SELECT (A80) is set to position "P  ". Assembly tool
12.2	Turn range selector shaft (3) of transmission counterclockwise up to end stop at position "D" (arrow)	When replacing the intelligent servo module for DIRECT SELECT (A80) Intelligent servo module for DIRECT SELECT (A80) is set to position "D  " (Arrow). (condition as supplied) Assembly tool
13	Detach vent hose (2)	When replacing the intelligent servo module for DIRECT SELECT (A80), the vent hose (2) must be replaced.
14	Install in the reverse order
15.1	Read out fault memory with STAR DIAGNOSIS and erase if necessary	When reusing the removed intelligent servo module for DIRECT SELECT (A80)
			AD00.00-P-2000-04A
15.2	Using STAR DIAGNOSIS carry out initial startup of the intelligent servo module for DIRECT SELECT (A80)	After replacing the intelligent servo module for DIRECT SELECT (A80)
			AD00.00-P-2000-04A

Fig 3: Identifying Retainer Wrench (164 589 02 07 00)

Courtesy of MERCEDES-BENZ USA

Fig 4: Identifying Assembly Tool (722 589 03 09 00)

Courtesy of MERCEDES-BENZ USA