From MB manual:

1. Remove speedometer cable from clips on cover under instrument panel, so that the cable can come along when the instrument cluster is pulled out.

2. Carefully introduce the pulling hook between padding and instrument cluster above vertical edge on instrument cluster and rotate. Pull out hook until it rests against detent.

3. Pull instrument cluster uniformly out on both sides, making sure that the speedometer cable slips into recess of cover for brake pedal, so that adequate length for removal is available.

4. Unscrew speedometer cable on speedometer and unplug wires.

Good luck

Paul