Here's how I removed the interior door trim from a benz '92 W124 230E
1. Using a broad blade screwdriver gently prize off the upper part of the plastic trim pictured below. Then slide it upwards.
2. Mirror trim removed:
3. Now again with a broad blade screwdriver gently prize the plastic trim from around the door handle:
4. Door Handle Trim Removed:
5. Now remove the bolt. Pull the door handle forwards and use a screwdriver to unseat the locking rod from the handle and pull the whole plastic piece forwards and out of the panel.
6. Now unscrew the plastic trim surrounding the door lock, it's removed in the pic below:
7. Holding the inner trim panel by the plastic door handle manouver upwards. The trim does not pull away from the door it pulls up Once the lugs have unclipped you can put your hand in the hole where the door unlocking mechanism was and persuade the trim at the top of the door (by the glass) to come away:
8. To give you an idea of how the plastic lugs on the back of the door trim look here's a pic:
1. Using a broad blade screwdriver gently prize off the upper part of the plastic trim pictured below. Then slide it upwards.

2. Mirror trim removed:

3. Now again with a broad blade screwdriver gently prize the plastic trim from around the door handle:

4. Door Handle Trim Removed:

5. Now remove the bolt. Pull the door handle forwards and use a screwdriver to unseat the locking rod from the handle and pull the whole plastic piece forwards and out of the panel.

6. Now unscrew the plastic trim surrounding the door lock, it's removed in the pic below:

7. Holding the inner trim panel by the plastic door handle manouver upwards. The trim does not pull away from the door it pulls up Once the lugs have unclipped you can put your hand in the hole where the door unlocking mechanism was and persuade the trim at the top of the door (by the glass) to come away:

8. To give you an idea of how the plastic lugs on the back of the door trim look here's a pic:
