roof window wiper

should work; what is this, some type of moon roof?

@ Dude - nein, nicht moon roof, sondern sun roof oder glass roof.Es ist also a glass roof wiper.

I have no idea what a moon roof is, but basically we are talking about a driver's cabin which is essentially a glass cube sitting on the vehicle (no glass floor, though)

glass roof wiper seems to fit quite well.

glass roof wiper gives you 9 hits, none of them valid:
http://www.google.com/search?client=safari&rl...

roof window wiper gives you 475,000 hits:
http://www.google.com/search?client=safari&rl...

your choice, though

A sunroof is not made of glass, it's made of metal and usually painted the color of the car on the outside.

A moonroof is a sunroof made of glass.
http://www.merriam-webster.com/dictionary/moo...

"A sunroof is not made of glass, it's made of metal and usually painted the color of the car on the outside"

BS.
Get out of the 80s, I'd say.

@ #6: I beg your pardon! What are you trying to say?

http://ask.yahoo.com/20030617.html
The answer?
"Sunroof" is the generic term used to describe an operable panel in a vehicle roof which can let in light and/or air. "Moonroof" is a term created by Ford in the 70s, yet is now used generically to describe glass panel inbuilt electric sunroofs.
Hmmm, so all moonroofs are sunroofs, yet not all sunroofs are moonroofs? We found further clarification -- "sunroof" is the term originally used to describe a metal panel that would only allow light or air in when opened. A "moonroof," on the other hand, is a glass panel that can allow light in even when it is closed (provided, of course, you slide back that nifty fabric-covered panel to expose the glass)