Terry - I've replaced both of my rear window regulators. On the left side I was able to get the Mercedes rivets to pop. although those are some heavy duty rivets. If you buy a rivet gun for the job, make sure you get a heavy duty one. On the right side which I did a few months ago, I could not for the life of me get the rivets to pop in place. So I just went to the hardware store and bought metric nuts/bolts/washers and used them. Worked just fine and will make my life easier the next time I have to replace it. I assume there will be a next time because I could not see any improvements on the new part vs. the old.

Len
'99 E300TD 99,500 miles