12 14 521 Replacing Pulse Generator On Crankshaft (S54)

Turn off ignition.

Remove reinforcement plate on front axle support.

CAUTION: The article DRIVE AXLE SHAFTS & SEAL (FRONT, ALL WHEEL DRIVE) contains important installation instructions.

NOTE: Installation location of pulse generator for crankshaft is underneath starter motor.

Unlock plug (1) and detach from distributor housing (2).

NOTE: For a better overview, the intake air manifold is not shown.

Fig 1: View Of Plug On Distributor Housing

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Release screw.

Installation:

Unclip cable of pulse generator (1) from holder (2).

Remove pulse generator (1).

NOTE: For a better overview, this work step is shown on an engine that has been removed and without the starter motor.

Fig 2: Removing Pulse Generator (Crankshaft)

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NOTE: Interrogate fault memory of DME control unit. Check stored fault messages. Rectify faults. Then clear fault memory.