Front brake caliper piston, removing and installing

WARNING: This page is about a different variant/trim than selected.

Special tools and equipment

Fig 1: 3409 Wedge

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Removing

Fig 2: Identifying Brake Caliper Housing

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NOTE: Place a piece of wood in the recess to prevent damaging the piston.

Fig 3: Remove Cylinder Seal Using Wedge 3409

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NOTE: When removing ensure that the surface of the cylinder is not damaged.

Installing

The surface of the piston and seal must only be cleaned with methylated spirits and then dried.
Thinly coat piston and seal with assembly paste G 052 150 A2 before inserting.
Insert oil seal in brake caliper housing.

Fig 4: Identifying Protective Seal With The Outer Sealing Lip On The Piston

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Fig 5: Inserting The Inner Sealing Lip Into The Grove In The Cylinder Using Wedge 3409

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NOTE: When doing this hold piston in front of caliper housing.

Fig 6: Pressing Piston Into Brake Caliper Housing Using Piston Resetting Tool

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NOTE: The protective seal outer sealing lip must slip into the piston groove.