51 34 420 Removing and installing/replacing trim on window frame of rear door (front), left or right

Necessary preliminary tasks: 

• Remove window cavity cover strip on outside of rear door  
• Open door window.

Security version: 

• Remove door window glass

Partially detach rubber seal (1) and rubber guide (2).

Fig 1: Detaching Rubber Seal And Rubber Guide

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Release screws (1).

Detach trim (2) towards front/top.

Fig 2: Detaching Trim

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Security version: 

M5 pull-in nuts (1) must not be damaged or missing.

Trim is designed as a protective cover and is screwed into place with M5 X 16 mm stainless steel screws without shims.

Fig 3: M5 Pull-In Nuts (1) Must Not Be Damaged Or Missing

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Installation: 

Trim (1) must not be damaged.

Fig 4: Identifying Trim

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Installation: 

Following parts must not be damaged or missing:

1. Plastic nuts
2. Felt strip
3. Seal
   Fig 5: Identifying Plastic Nuts, Felt Strip And Seal

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Installation: 

To prevent wind noises.

Check gap with a 0.05 mm feeler gauge.

Slide feeler gauge between B-pillar trims on front and rear doors.

When the finishers are correctly adjusted, it must be possible to feel a slight suction resistance over the entire length of the finisher.

If the gap is too big, this may result in wind noises.

Fig 6: Checking Gap Between B-Pillar Trims

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Installation: 

If necessary, release screws (1).

Press trim (2) towards front and tighten down screws (1).

If gap is still too big, adjust trim on window frame of front door.  

Fig 7: Pressing Trim

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