One thing I did not mention:

I used a bunch of soft wood shims to wedge the window in place so that I could work without it falling down. It took three bundled up to fit the gap after the rubber strip came out with the door panel.

I usually had two sets in place to make sure things stayed put. I am not sure how, but the vertical slider came off its track at some point. When the regulator was out, I found that the glass would wobble fore and aft a good bit.

Regards,
Tom

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2016 E350 4matic wagon
2010 ML350 Bluetec
1995 E300D Gone, but not forgotten.