I just did this repair in my 92 300SL. Remove the lower bolster under drivers side dash. Pull instument cluster. Once the bolster is out, just reach up under the dash and gently push the instrument cluster out. The ring in the dash around the key opening should be able to come out by hand, no tool required on mine. You'll need the shortest key you have. Once the inginition housing is detached from the steering lock, I had to pull the housing up from the hole in the dash where the instrument cluster was. It wasn't easy, and it took some well placed force. One issue is the with the key in the ignition, there isn't enough space to work the unit out. Regardless, I did not have to remove the steering wheel or dashboard. I didn't unhook the wires from the instrument cluster, I just pushed it over to the left side as far as the wires would stretch. By the way, I changed the ignition switch. All is good now.