Disassemble And Assemble Electrohydraulic Controller Unit - AR27.19-P-0220MFA

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Model 118, 177, 247 with transmission 724.1

Courtesy of MERCEDES-BENZ USA

	Risk of injury to skin and eyes due to handling of transmission oil. Health risk caused by swallowing transmission oil	Wear protective gloves, protective clothing and safety glasses. Do not pour transmission oil into beverage bottles.	AS00.40-Z-0001-01A
Notice	Notes on threaded connections fastened using a tightening angle-based tightening process		AH00.00-P-0020-01A
Notice	Notes on self-locking nuts and bolts		AH00.00-P-0001-01KOA
Notice	Information on preventing damage to electronic components due to electrostatic discharge		AH54.00-P-0001-01A
	Notes on safety-relevant components		AH00.00-Z-0019-01A
	Notes on automatic transmission		AH27.19-P-0001-01NKB
	Remove
1	Read out fully integrated transmission control electric controller unit control unit (N15/15n1) and save adaptation values.	When replacing the fully integrated transmission control electric controller unit control unit (N15/15n1).
		Before removing the fully integrated transmission control electric controller unit control unit (N15/15n1), read out and save the adaptation values stored there using the diagnostic system. If communication with the previous fully integrated transmission controller unit control unit (N15/15n1) is not possible ↓ replace complete electrohydraulic controller unit.	AD00.00-P-2000-06MFA
2	Remove electrohydraulic controller unit.		AR27.19-P-0200MFA
	Disassemble/assemble
3	Unscrew screws (2) of fully integrated transmission control electric controller unit control unit (N15/15n1) at shift valve housing (3).	Assembly: Replace screw/bolts (2) Bolt, GC control unit to valve housing	*BA27.19-P-1003-01E
4	Unscrew screws (4) of auxiliary oil pump at fully integrated transmission control electric controller unit control unit (N15/15n1).	Assembly: Replace screws (4) Bolt, electrical tandem pump	*BA27.19-P-1001-01E
5	Remove fully integrated transmission control electric controller unit control unit (N15/15n1).	Assembly: Make sure that the fully integrated transmission control electric controller unit control unit (N15/15n1) is positioned correctly at the shift valve housing (3).
6	Remove sealing rings (5) from shift valve housing (3).
	Automatic transmission fluids (ATF) (specification 236.22)	Assembly: Observe Specifications for Operating Fluids. Otherwise the transmission will be damaged Assembly: Replace sealing rings (5) and moisten with transmission oil.	BB00.40-P-0236-22A
7	Assemble in the reverse order.
	Install
8	Install electrohydraulic controller unit.		AR27.19-P-0200MFA
9	Transfer stored adaptation values to fully integrated transmission control electric controller unit control unit (N15/15n1) and perform SCN coding.	When replacing the fully integrated transmission control electric controller unit control unit (N15/15n1).
		Use the vehicle diagnosis system used before removal.	AD00.00-P-2000-06MFA

ELECTROHYDRAULIC CONTROLLER UNIT

Number	Designation					Transmission 724.1
BA27.19-P-1001-01E	Bolt, electrical tandem pump	to valve housing	M5x95	Stage 1	Nm	3
		to valve housing	M5x95	Stage 2	∠°	60
		to oil distributor plate	M5x75	Stage 1	Nm	3
		to oil distributor plate	M5x75	Stage 2	∠°	60
		to GC control unit			Nm	5

ELECTROHYDRAULIC CONTROLLER UNIT

Number	Designation				Transmission 724.1
BA27.19-P-1003-01E	Bolt, GC control unit to valve housing	M4	Stage 1	Nm	2
BA27.19-P-1003-01E	Bolt, GC control unit to valve housing	M4	Stage 2	∠°	90