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

TRANSMISSION 722.9 in MODEL 221.0/1, 216.3 

Fig 1: Identifying Intelligent Servo Module Remove/Install Components - Illustrated On Model 221.171

Courtesy of MERCEDES-BENZ USA

Illustrated on model 221.171 

Fig 2: Identifying Intelligent Servo Module Remove/Install Components - Illustrated On Model 221

Courtesy of MERCEDES-BENZ USA

	Remove/install
	Risk of death  caused by vehicle slipping or toppling off of the lifting platform.	Align vehicle between columns of vehicle lift and position four support plates at 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 self-locking nuts and bolts		AH00.00-N-0001-01A
1	Release parking brake
2	Disconnect ground lines from batteries	Insulate terminals of ground lines to prevent accidental contact with the ground points of the batteries.	AR54.10-P-0003SX
	Notes on battery		AH54.10-P-0001-01A
3	Remove bottom engine compartment paneling	Vehicles without top protection	AR61.20-P-1105SX
		Vehicles with code (Z07) Top protection	AR61.20-P-1105SXS
4	Support and secure transmission (1)	Secure the transmission (1) with a tensioning strap to prevent it from tilting or slipping off.
5	Remove rear engine cross member (2)	The engine mount (5) must also be removed on vehicles without 4-MATIC.
		Without 4-MATIC	AR22.10-P-1180SX
		With 4-MATIC	AR22.10-P-1180SW
6	Mark position of front flexible coupling relative to output flange and propeller shaft	This is to ensure reinstallation at the ex-factory installation position, otherwise drive line vibrations can be produced.
7	Detach propeller shaft from transmission (1)	If the fitted sleeves are jammed: ↓	AR41.10-P-0050-02SX
		Release the guide sleeves on	AR41.10-P-0050-09SX
	Drift for loosening fitting sleeves in flex disks.		WF58.50-P-4110-01A
		Attach the propeller shaft.	AR41.10-P-0050-07SX
			*BA41.10-P-1001-01H
8	Detach front exhaust bracket (6) from transmission (1)	Without 4-MATIC
		Engine 156, 272, 273	*BA49.10-P-1008-01Z
		Engine 629	*BA49.10-P-1004-01AA
		Engine 642	*BA49.10-P-1002-01V
9.1	Remove exhaust system from flange connections (center muffler to catalytic converters)	without 4-MATIC
		Engine 156, 272, 273	AR49.10-P-7100SX
		Engine 629, 642	AR49.10-P-7100SXI
9.2	Detach exhaust system from exhaust manifolds	Engine 273 with 4-MATIC	AR49.10-P-7100SX
9.3	Detach exhaust system from diesel particulate filter	Engine 642 with 4-MATIC	AR49.10-P-7100SXI
10	Detach front exhaust system from rubber retainers
11	Disconnect electrical connector from intelligent servo module (A80)
12	Lower transmission (1) slightly	When the engine is being lowered, it must not rest on the front axle carrier, otherwise the engine oil pan will be damaged.
13	Remove the bolts (10) on the intelligent servo module (A80)	Replace bolts (10).
			*BA27.40-P-1021-01A
14	Remove intelligent servo module (A80) with bleed hose	When reusing  the intelligent servo module (A80) do not  detach bleed hose. Leaky separation points result in water entry.
15	Rotate the range selector shaft (3) of the transmission (1) counterclockwise  up to the end stop at position "D"  (arrow)	When replacing the intelligent servo module (A80). the new  intelligent servo module (A80) is on position"D"  (arrow). (condition as supplied) When replacing  intelligent servo module (A80) replace bleed hose. The positions of the range selection shaft (3) and intelligent servo module (A80) must match up, rotate range selection shaft (3) if necessary.
			Fig 3
16	Install in the reverse order
17	Connect STAR DIAGNOSIS, read out fault memory and erase if necessary
18	Using STAR DIAGNOSIS, perform initial startup of intelligent servo module (A80)	After replacing  intelligent servo module (A80)

Fig 3: Identifying Assembly Tool (722 589 03 09 00)

Courtesy of MERCEDES-BENZ USA