Originally Posted by rog2961

Anyone ever do it? Have a squeak under the dash. Took out instrument cluster and its behind the ac vent tube. Thought it may have been outside up fron, took off wipers and siliconed the outside and nothing. Looks like I'm taking the dash off. Anyone ever have a squeak under the dash that was easily fixed before I tear this thing apart? Sprayed inside and out made no difference.

Originally Posted by Rainier

I had a really bad squeek originating someplace in the dash when the car was very new. It really annoyed me.
In desperation I pushed the dash in a few places hard - when pushing in the direction of the airvents on the drivers side I heard a distinct "click". Squeek gone.
Obviously one of the clips was not holding that side of the dash.
Might want to give that a try...

Another source that is easy to fix are the plastic seat belt buckles in front (the part that is connected to the seat frame). They are a bit short on their stems so they can rub against the leather of the seat when used. This not only squeeks but obviously does the leather no good.
Loosen a bolt that holds the stalk onto the seat frame and then you can rotate the plastic bit further back so it no longer touches anything.

Sun visors can squeek against the roof liner - just reposition them slightly and that tends to go away.

All of the seat belt reals can rattle inside. Only way is to open up the retract mechanism and place a dab of silicon grease on the mechanics - that stops the rattle.

The back seat rest tilt mechansim as well as some internals related to the seat position adjustment can also rattle (usualy at certain RPM). Same solution here (with the grease) but it does require removal of the seats. Best left to the dealer unless you are like me and don't really trust a mechanic (don't ask, many long stories).

Driver and PAX doors contain a few parts that can easily rattle. Silicon grease is a great fix here too. The door panels come of easy (locate three screws under the small plastic trim pieces (use a plastic lever to pop them off - start with the one under the handle).
One of the issues is the sound system. If you have the basic system or Bose too much bass is routed to the speakers in the doors turning the entire door panel into a big speaker membrane or sorts. That not only sounds horrible but causes parts of the door mechanism to vibrate in tune. Isolating the speaker itself does not help as this is an accoustic problem. if you are handly with these things you can stiffen the door panel with wooden stiffners you can make youself (wood works well as it's quite neutral). Probably best though to solve the problem using electronics - prevent too much bass from getting to these speakers in the first place (which is what the Burmester does) and instead use the center woofer in the dash for that (not fitted in the basic sound system).

Rainier

Originally Posted by rog2961

It ended up being the loose strut brace nut in the engine bay transmitting the noise into the cabin for the next guy that thinks it's under his dash. FYI I found this out after ripping apart the dash.