How to remove instrument cluster
 

91 300E, Need to jumper dimmer switch. What is the best way to remove
cluster.88,755 Miles Blk/Mushroom int. First Benz, just done complete brake job,it had the original brakes on it.Headliner is dropping a bit,car is tight. Thanks, glad to be a part of this cool forum.
Monty.

cdplayer
 

Arrow down to the bottom of this page. On the right you see "Forum Jump". Chose "DIY Links by Parts Catagory". Click on that. Then arrow down to a link "Body electrical". Click on that. Then arrow down to link "How to remove instrument cluster". Take time to check out all the links that may help you. Tons of info in here. Enjoy.

What is the problem with the dimmer?
If it is causing the lamps to work intermittently, sometimes if you work the control through the full rotation quickly a dozen times the oxide will wear off of the control.
If that doesn't work you could remove it and clean the control's wiper and resistive element with 600 or finer sand paper.