13 63 555 Replacing throttle potentiometer (S62)

Interrogate fault memory of DME control unit.

Switch off ignition.

Remove and install intake air manifold, refer to 11 61 050 REMOVING AND INSTALLING INTAKE AIR MANIFOLD (S62) .

Instructions apply to removing and installing both throttle potentiometers on left and right.

The illustrations show the left throttle potentiometer being removed.

The installation location is on the throttle body, rear.

For a better overview, the following work steps are shown on an engine that has been removed.

Disconnect plug connections (1).

Unclip cables (2) from cable guides.

Fig 1: Disconnecting Plug Connections & Cables

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Disconnect plug connections (1) on left knock sensor pair.

Fig 2: Disconnecting Plug Connections On Left Knock Sensor Pair

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Disconnect plug connection (1) on throttle actuator.

Fig 3: Disconnecting Plug Connection On Throttle Actuator

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Unhook cable duct (2) from mounts and raise approx. 2 cm.

Installation: 

Check seating of rubber grommet on cylinder coil cable.

Unclip cable strip (3) from injector valves, push upwards and tie back with cable ties (e.g. to engine hood).

Disconnect plug connection (1).

Release screws (2).

Remove throttle potentiometer (3).

Fig 4: Removing Throttle Potentiometer

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Installation: 

Check seal (1) on throttle potentiometer, replace if necessary.

Fig 5: Checking Seal On Throttle Potentiometer

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Interrogate fault memory of DME control unit. Check stored fault messages.

Rectify faults. Now clear the fault memory.