52 17 023 Removing and installing/replacing adjusting unit for thigh support on left or right front seat

Special tools required: 

• 00 9 325

Move front seat into top position.

Unclip cover (1) with special tool 00 9 325 starting at the inside (arrow).

Fig 1: Removing Front Seat Thigh Support Cover

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Fold up and unclip cover (1).

Fig 2: Folding Front Seat Thigh Support Cover

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Move thigh support (1) as far forward as possible.

Fig 3: Identifying Seat Thigh Support

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Production date up to 04/2010: 

Release screws (1).

Disconnect plug connections (2).

Remove thigh support (3) towards top.

Fig 4: Identifying Thigh Support, Plug Connection And Screw

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From production date 04/2010: 

Unfasten plug connection (1) and disconnect.

Unfasten screws (2).

Remove thigh support upward.

Installation note: 

Insert screws (2) with Loctite.

Fig 5: Identifying Seat Thigh Support Plug Connection And Screws

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Unclip and remove cover (1) toward the top with special tool 00 9 325 .

Installation note: 

Secure guide pins (2) in seat frame and clip cover (1) into place.

Fig 6: Securing Guide Pins In Seat Frame

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Disconnect plug connection (1).

Fig 7: Identifying Seat Plug Connection

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Release screws (1).

Fig 8: Identifying Seat Plug Connection Screws

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Raise adjusting unit (1) complete with electric motor in direction of arrow and feed out downward.

Fig 9: Adjusting Seat Electric Motor Nut

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Installation note: 

Adjusting unit (1) must lie flush on facing (2).

Fig 10: Identifying Thigh Support Adjusting Unit

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Installation note: 

Make sure latch mechanism (1) of adjusting frame is correctly on frame (2) (as illustrated).

Fig 11: Identifying Seat Frame And Latch Mechanism

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