Space is definitely tight. When I did this job, I started with the easiest bolt I could get to first, got it finger tight, then got the 2nd one going. Was not an easy or fast process because the clearance just isn't there.

Adjusting the switch is easy. Chock the wheels if you have it on ramps and set the parking brake. Put it in reverse with the key on (but engine not running!) and turn the switch until the reverse lights come on. Tighten bolts.

__________________
Current stable:
1995 E320 157K (Nancy)
1983 500SL 125K (SLoL)

Gone but not forgotten:
1986 300SDL (RIP)
1991 350SD
1991 560SEL
1990 560SEL
1986 500SEL Euro (Rusted to nothing at 47K!)

Gone and wanting to forget:
1985 524TD 167K (TotalDumpster™) [Definitely NOT a Benz]