I had good luck simply cleaning the contacts in the switch -- over one year so far, and still working flawlessly. Once you have the switch out of the dash, you'll see how it comes apart. It will take you all of about 5 minutes to clean the contacts. Then plug it back in and see if it works. If not, order the new switch, and all you've lost is 5 minutes.

Just my 2 cents... arguably worth that.

Jeff Pierce
--
'93 945 Turbo ( one kickass family car ! ), '92 Mercedes 190E (my daily driver), '53 Willys-Overland Pickup (my snow-plow truck/conversation piece -- sold to a loving home), '85 Jeep CJ-7 w/ Fisher plow

I replaced the sunroof switch in my '93 940. The plastic fascia may be removed by carefully prying it out starting at the end farthest from the steering wheel and working toward the steering column. There is a fairly stout metal clip about half-way. Don't start at the steering column or you'll break the plastic there. I learned how to do this from the 700/900 FAQ, check those to be sure my memory is right.

Once the fascia is off, the switches come with it. The sunroof switch has an electrical connector which you must disconnect. Then the switch is held into the fascia by plastic clips on the side of the switch. You press those inward to relaese the switch. It's fairly obvious at this point.

This is a good time to check and replace any of the light bulbs which illuminate the switches in the fascia.