I have had a1989 760 Turbo since new, it just turned 75k miles , driving the other day with the a/c on, i noticed that i was getting nasty black peices on me what is best described as rotten black sticky foam. Today i removed the air vent's,in the dash and found larger 1/8" thick peices stuck behind them waiting to be blown out.
I would appreciate anyone with any idea's or ananswer, before i strip the whole dash out.!

 

The foam is originally to seal all the joints in the vents.
After a while the foam falls out.
There really isn't all that much you can do but have it all blow out.

 

Hi Tech...Thanks for your reply....I thought that may be something to do with it....I wishedthere was a way to speed up the process ..guess I'll run the fan on high for a while and see what happens.
Thanks again