My biggest gripe with noise in my SDL is the wind noise from the door pillar. I've check the door seals, and conditioned them, but there still seems to be that wind noise. Unfortunately, since I'm tall, my seat is back and my head is right nest to the pillar.

Anyone have any suggestions to help with this?

__________________
87 300SDL - 215K Miles !!
99 F-350CC Dually PSD - 190K
86 300SDL - 189K
All on B-100

this type of noise is usually caused by the huge gap between the door and the body of the car, getting some balloon style rubber and attaching it to the door to fill this gap, should remove that noise.

__________________
John HAUL AWAY, OR CRUSHED CARS!!! HELP ME keep the cars out of the crusher! A/C Thread
"as I ride with my a/c on... I have fond memories of sweaty oily saturdays and spewing R12 into the air. THANKS for all you do!

My drivers:
1987 190D 2.5Turbo
1987 560SL convertible
1987 190D 2.5-5SPEED!!!

1987 300TD
2005 Dodge Sprinter 2500 158"WB
1994GMC 2500 6.5Turbo truck... I had to put the ladder somewhere!

My leather seats make the most noise in the SE.

I've often wondered about stategically placed exhaust to body brackets. Maybe re-introducing the vibration into the cab 180 degrees out of phase with the ambient noise such that the noise is cancelled/reduced.

Agreed. The SD's seats are miserable because they are relatively stiff. Even the SDL seats, which are softer, exhibit the characteristic ticking sounds that simply won't cease. The only solution is the music........

It's been a while since I checked this so I will answer the last few questions.
Arminski, I purchased 1 sheet of insulator 5 ft long (it comes either 3 or 4 wide) can't remember.
Probear, As far as the wind noise around the pillar goes, I had some and tracked it down to the A pillar. Removed the trim on the inside between the door and windshield and filled the hollow openings with expandable foam....huge difference....very quiet now. You could probably do the same to the mid door pillar as well as it is hollow also. As long as you don't have a water leak all should be fine for years to come.
Yes my seats make some noise also....goes with the territory of old hard leather, it is well within a tolerable level and the radio makes it non existant.
Whiskeydan, Ypu are right...exhaust vibrations are brutal at highway speeds. I had sprayed the entire exhaust with a very thick coat of the "firewall" product from 2nd skin. This has drastically reduced all exhaust noise and vibration. I don't know how long it will stay adhered but so far all has worked out great and it's been a few thousand miles.

Hello, I have read and re-read your posts on sound proofing. Thanks for all of the great information! I went ahead and spoke with the guy at Second Skin and ordered some of the coating product you used. I was wondering, how is it holding up in the areas you applied it externally, like the underside of hood, the exhaust, and underside of the car?
In fact, a general update on sound performance, deficiencies and or improvements you have made subsequently would be great if you have time.

I did a similar project that may be useful in documentation. Search my posts or google 84 300TD soundproofing.

__________________
84 300td (Yes, a wagon)
"The Golden Dragon"
195k, 2nd owner
Lives in Redmond, WA