You do not need to take off the Hood to replace the Pad.
Here is a single post from a thread I posted in.
Be sure to use 3M 8090 spray adhesive.
Finally gave up on hood pad; anyone want to convince me to replace?
Just in case that thread ever get deleted.....
I replaced the pad on 2 W123`s this summer by my self.
Lay a plastic tarp, sheet etc... across the engine. this will keep all the crumbling pad off the engine. pull down big pieces and scrape off what you can with a putty knife.
Then I raised the hood straight up, got on the engine and wiped the surface down with a wax and grease remover. a product used when prepping the body for paint.
Mark the center of the hood top and bottom with a felt tip marker. do the same with the pad.
masked off the windshield and eng bay, then using 3M 8090 spray adhesive sprayed the hood area with 2 coats. then sprayed the pad with 2 coats for good coverage.
Let it get tacky.
Fold pad in 1/2 (none glued side) and line up the centering marks on pad to the marks on the hood. make sure the top corner is lined up as well as the bottom corner. then smooth it down, then do the other side.
Run your hand across the pad with some pressure to make sure the pad is secured to the hood.
It did make the 240 a little quieter.
Charlie