I tried scraping the adhesive remains and they came off better than expected, I thought they would be gummy but they were dry! I will continue to remove all the remnants and move to phase two. Entire engine bay is covered. The noise is not a factor but the idea of slowly baking flawless paint to death doesn't set well.I wouldn't remove the hood. I did this on my 190e in the driveway and it wasn't too bad. Just get a plastic scraper and a tarp to catch crumbs. Should take you a couple hours. You will need a helper to re-stick the new pad.
I am replacing both pads after studying what was available, seems the rear pad is a rare bird indeed anywhere aftermarket! I only found on source for the firewall seal and it was no longer available and the P/N tracks to a rear pad. An idea what the P/n is for the seal? Mine is missing altogether so I don't even know what it looks like.The 107 actually has a hood pad, and separate seal that covers the second bulkhead. IMO it is very worthwhile to keep these in place. Quieter operation, heat shielded from causing damage to the exterior paint. The seal helps in keeping under hood smells from the passenger compartment, and probably assists in HVAC operation.
I have a can of 3M 08090 all ready to go.
And if you're going to use spray adhesive, definitely remove the hood/bonnet and do the pad install well away from the car. I've read plenty that have ended up with a big clean up job removing the spray residue off their car afterwards. It's one of the reasons I used a cheap foam roller. The other was better glue applicationThat's the one that really works. Not cheap, except when compared with that MB stuff I can see Pierre using it. He gets to pay wholesale price and then can charge it in customers bill. But we can't do that!
I used two spray cans of 3M 08090 for two hood pads. Applied about 3 thin coats to each side in criss-cross pattern. I removed hoods to do this. Never came loose! Still on the SL after many years. Took forever to remove it from my W123.