51 22 090 Removing and installing/replacing door lock in left or right rear door

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Special tools required:

51 2 190 , see 51 2 190 DOOR LOCK TENSIONER

Necessary preliminary tasks:

Remove sound insulation, see 51 48 060 Removing and installing/replacing sound insulation in left or right front door .
E70 Security: Slacken screws for protective mat

Disconnect Bowden cable to outside handle at bottom (1) and top (3) from door lock (2).

Installation:

Bowden cable must be correctly engaged in locators in door lock (2).

Bowden cable must be laid without kinks in bend to door lock (2).

Seal (4) must be correctly fitted on Bowden cable.

IMPORTANT: Door cannot be opened if Bowden cable (1) is incorrectly laid.

Fig 1: Identifying Door Lock, Bowden Cable And Seal

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Unlock plug connection (1) at lugs (2) and detach from door lock (3).

Unclip locking rod (4) from door lock (3).

Fig 2: Identifying Locking Rod, Plug Connection And Door Lock

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Version with Soft Close Automatic:

Disconnect plug connection (1).

Release screws (2).

Fig 3: Identifying Plug Connection And Screws

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IMPORTANT: Do not damage door lock seal during removal.

Release screws (1).

Remove door lock (2) from inside and carefully feed out.

IMPORTANT: To avoid leaking and electrical malfunction:
Pull door lock (2) with special tool into corner (3), see Fig 7 and Fig 8.

Fig 4: Identifying Door Lock, Corner And Screws

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Installation:

Seal (1) on door lock (3) must not be damaged.

Adapter switching socket (4) must be correctly engaged.

Door wiring harness must be correctly laid in guide (3).

Fig 5: Identifying Seal, Switching Socket And Door Lock

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Installation:

Version with Soft Close Automatic:

Make sure Soft Close Automatic drive (1) is installed in correct installation position. Control line (3) must not be twisted around Bowden cable (2).

Make sure control line (3) is correctly laid in guides (4).

Fig 6: Identifying Control Line, Soft Close Automatic Drive And Guides

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Installation:

Install door lock and insert screws (1), do not tighten down.
Slide special tool 51 2 190 into opened rotary latch until latch engages in first stage.

Fig 7: Identifying Door Lock Screws

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Installation:

Pretension door lock (1) with knurled screw (2) until special tool 51 2 190 just contacts corner points (3).
IMPORTANT: To tension door lock (1), it is only permitted to turn knurled screw (2) by a further 1 to 1.5 turns (max.) (risk of damage).
Door lock seal must rest uniformly on inner door plate (water ingress).
Tighten down door lock screws, tightening torque 51 22 1AZ , see 51 22 REAR DOOR LOCKS .

Fig 8: Identifying Door Lock And Knurled Screw

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Installation:

Carry out function check of child lock (1) and door lock (2) with door opened.

Fig 9: Identifying Child Lock And Door Lock

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