12 51 001 Replacing wiring harness section for engine (M60, M62): Installation:

Position acoustic cover and press downwards until press-stud fasteners (1...4) click into place.

Unfasten clips (1).

If fitted, unfasten hose clip (2) on air intake hose for air pump.

Disconnect plug-in connection (3).

Unfasten hose clip (4).

M62: Disconnect plug connection on temperature sensor for intake air.

Remove upper section of suction filter housing with mass air flow sensor.

Remove left and right cover from ignition coils.

Unfasten left and right connections on ignition coils.

Remove accelerator cables (1 and 2).

1. Accelerator pedal
2. Cruise control
   Fig 5: Removing Accelerator Cables

   

Unfasten screw connection on oil filter housing.

Disconnect plug connection on oil pressure switch.

Place oil filter housing to one side.

Cut connections on alternator (illustration of connections, refer to next figure).

Connections here illustrated on removed alternator.

Unfasten plug connection (1).

Unfasten nut (2).

Tightening Torque, refer to 12 31 1AZ ALTERNATOR WITH DRIVE AND MOUNTING

Unfasten plug connections to Lambda oxygen sensors on both sides.

Note line routing of Lambda oxygen sensor (1) under the heat shield!

Disconnect plug connection on reversing light switch. Note wire routing!

Unfasten nuts on starter motor wires.

Tightening Torque, refer to 12 41 4AZ STARTER AND MOUNTING PARTS

Unfasten plug connection on oil level switch.

Unfasten plug connection on cable duct (1 to 3).

1. Knock sensor cylinders (3 and 4)
2. Knock sensor cylinders (1 and 2)
3. Pulse generator for TDC on vibration damper on the crankshaft
   Fig 5: Removing Plug Connection On Cable Duct

   

Only M60 B30:

Disconnect plug connection (1) on solenoid valve for air accumulator.

Press down retaining bracket.

Pull off connectors.

Unfasten plug connection on cable duct (1 to 3).

1. Knock sensor cylinders (7 and 8)
2. Knock sensor cylinders (5 and 6)
3. Sensor for cylinder recognition (camshaft sensor)
   Fig 8: Removing Plug Connection On Cable Duct

   

Disconnect plug connection (1) on tank vent valve.

Unclip wire from brackets on protective tube (1) of positive battery lead.

Disconnect plug connection (1) on idle speed adjuster and plug connection (2) on throttle valve potentiometer.

Disconnect plug connection on throttle valve potentiometer for ASC+T.

Unclip lines on guide tube (1) for dipstick.

Unclip lines on guide tube (1) for dipstick.

Unclip wire on front of upper section of oil pan.

Disconnect plug connection on rear of water box (1 to 3).

1. Temperature sensor for coolant for DME (white)
2. Temperature sensor for remote thermometer (black)
3. Ground connection of ignition coils (terminal 4a)
   Fig 16: Disconnecting Plug Connection

   

Ground connections (1), unfasten nuts.

Unclip diagnosis connector (2) from bracket.

Unfasten ignition coil connections (3).

Unfasten screws on cable ducts.

Remove cable ducts from brackets.

Unfasten screws in cover of electronics box.

Tightening torque: 4.4 N.m

Remove relays (1 and 2) with bracket.

1. Relay for oxygen sensor heating
2. Relay for Digital Motor Electronics (DME)

   (can be recognized because cross section of feed lines is greater than 2.5 mm2 )

   Fig 20: Removing Relays

   

Disconnect plug connection on temperature sensor of electronics box.

Disconnect plug connection (1 to 3).

1. Control unit for automatic transmission
2. Control unit for cruise control
3. Control unit for Digital Motor Electronics (DME)
   Fig 22: Disconnecting Plug Connection (1 Of 2)

   

Disconnect plug connections (1 to 4).