[blkpwr]

I have an 06 s197 and was wondering if dynamatting the doors would help keep road noise out of the cabin and if so how much would it?

[jgorm]

Doing the doors will give you a decent gain, but doing the floor will probably do more. I would go with second skin damplifier pro over dynamat. Cheaper and higher performance.

[blkpwr]

I know there were some cheaper knock offs, but the shops I called use dynamat, and I am not competent enough to do it myself. Good to know about the floors, etc helping the noise issue