You can attach it easily with 3M Super Trim Adhesive
Part#: 511535-080909 (a heavy duty spray adhesive). Use this stuff instead of the regular spray adhesive.
Be sure to carefully cover the engine and areas you don't want to get this stuff on.
Spray both sides and DO NOT attach. Let dry. Spray again a second time. DO NOT attach. Let dry.
Then carefully attach starting with the already attached area and work towards edge to avoid wrinkles.
I have an old bed sheet that I drape over the entire engine to keep the stuff from getting all over everything, which it will.
'03 E320 Wagon-Sold
'95 E320 Wagon-Went to Ex
'93 190E 2.6-Wrecked
'91 300E-Went to Ex
'65 911 Coupe (#302580)