I replaced my hood pad on my 1987 300E two years ago. I used 3M Super
Trim Adhesive (yellow) Part No. 08090 in a spray can. The can has a
fairly high tech spray nozzle that controls the spray very well.
Clean the old material off he underside of the hood as well as you can
so you are re-glueing to metal, not crusty old pad material. I used a
wire brush to make sure anything left I was glueing to was stuck to the
metal well. I wiped it with paint thinner (exact same product as parts
cleaning solvent in the "old days' when I worked for Union 76). I
masked off around the hood and covered the windshield and engine, but
the #M nozzle made it pretty much unnecessary.
The secret is to spray both the pad and the underhood and wait the 10
minutes or so just as the directions on the car tell all of us impatient
people to do.
Make sure you have it aligned correctly since the adhesive will stick
immediately and never let go. I marked the middle and attached at the
bottom of the hood at the cowl and pushed it up to center it at the top
front grill then smoothed it outward at the bottom and out to the sides
of the hood. I used a small paint roller to push it into contact
Not a hard job. Cleaning all the old stuff off is a nasty job that most
shops will try to avoid by quoting an outrageous price. Not to mention
the come-back if it falls off.
Pete Cowper (1987 300E)