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Removing Your Rear Door Lock
 
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Pelican Technical Article:

Removing Your Rear Door Lock

Steve Vernon

Time:

3 hours3 hrs

Tab:

$175

Talent:

**

Tools:

T20, T30 Torx, drill and bit, rivet tool or replacement nuts and bolts

Applicable Models:

Mercedes-Benz W203 (2001-07)

Parts Required:

Gaskets, zip ties and hardware

Hot Tip:

Get new gaskets

Performance Gain:

Doors that work

Complementary Modification:

Replace switches

Replacing the rear door locks on your Mercedes C320 involves the removal of the door panels and the outer door handle before you can remove the lock. Please see our article on removing your rear door panel and the rear door handle. You must complete the work on the door panel and handle to get you to the point where this job starts.

With the membrane off the door you can see the door lock, pull, release cable and wiring.

Begin by unplugging the lock wiring connection from the panel on the door.

Follow the wires back to the lock removing the clips as you go. Use care here as you will want to reuse these clips when you put everything back together.

Use a T30 Torx and remove the three Torx screws holding the lock to the door frame.

There is a single screw holding the two piece foam insulator in the door located just bellow the door lock. Remove this screw with a T20 Torx.

You will need to reach inside the door and separate the foam block while in the door. Slide the two pieces apart and lower them separately through the door opening bellow.

This will give you enough room to lower the door lock into the bottom of the door and out through the access hole.

Installation is the reverse of removal. Make sure you hook the L shaped part of the door handle behind the bracket on the lock when reassembling.

With the membrane off the door you can see the door lock (green arrow), pull (yellow arrow), release cable (blue arrow) and wiring (red arrow).
Figure 1

With the membrane off the door you can see the door lock (green arrow), pull (yellow arrow), release cable (blue arrow) and wiring (red arrow).

Begin by unplugging the lock wiring connection (red arrow) from the panel on the door.
Figure 2

Begin by unplugging the lock wiring connection (red arrow) from the panel on the door.

Follow the wires back to the lock clipping the zip ties as you go (red arrow).
Figure 3

Follow the wires back to the lock clipping the zip ties as you go (red arrow).

Use care here as you will want to reuse these clips when you put everything back together.
Figure 4

Use care here as you will want to reuse these clips when you put everything back together.

Use a T30 Torx and remove the three Torx screws (red arrows) holding the lock to the door frame.
Figure 5

Use a T30 Torx and remove the three Torx screws (red arrows) holding the lock to the door frame.

There is a two piece Styrofoam insert between the inner and outer door skins that is held in place by a single T20 Torx screw (red arrow).
Figure 6

There is a two piece Styrofoam insert between the inner and outer door skins that is held in place by a single T20 Torx screw (red arrow). Remove this screw.

This photo illustrates the Styrofoam insert.
Figure 7

This photo illustrates the Styrofoam insert. You can see how it slides together to create one part. This action must be done while the Styrofoam is in its position in the door. Slide the piece apart and remove from the door.

This will give you enough room to lower the door lock into the bottom of the door and out through the access hole.
Figure 8

This will give you enough room to lower the door lock into the bottom of the door and out through the access hole.

Make sure you hook the L shaped part of the door handle behind the bracket on the lock (red arrow) when reassembling.
Figure 9

Make sure you hook the L shaped part of the door handle behind the bracket on the lock (red arrow) when reassembling.

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Page last updated: Fri 12/9/2016 02:28:37 AM