Hi.
what can i do for my colt

for example; road and engine noise .

Buy engine mats of the diesel. (3pieces)

ALExander

Add dynomat from the usa :- also if u`re in uk, u can get it in holfords about 20 quid for standard and forty for extreme..
to remove the door cards u will have to take out botton door screws,handle, and top trim. door handle has cover over screw!
make a pattern (so it fits ) fit matting ....
also consider getting new speakers the best size is 16.5 with slight modification (use rubber gaskets or door frame selant)

Back pannels remove with pull off positions Umm Kay!