Gary:

I suspect the fader is shot or unplugged --this will disconnect the speakers and may do funny things to the head unit, too. Was the case on the TE when I removed the console.

You can check by removing the trim panel containing the fader and mirror switches -- pull up the carpet in the console (it just tucks under the edges) and remove the screw, them pull up the rear end of the wood trim. It will be very stiff (the two switches are attached to it) but will come up. It is hooked under the front edge. You may also need to pull the trim around the shift quadrant, but mine just pops up. Later models the trim here doesn't come off at all, be carefull.

check the condition of the fader and the contacts -- if the trim isn't seating all the way, contact will be intermittant and you will need to pry the swtich off the trim and install it, then put trim back on. I believe the trim warps a bit.

Otherwise, I suspect you have something making intermittant contact inside the head unit. Repair or replace at your discresion.

Removing the console is a big PITA.

Peter

__________________
1972 220D ?? miles
1988 300E 200,012
1987 300D Turbo killed 9/25/07, 275,000 miles
1985 Volvo 740 GLE Turobodiesel 218,000
1972 280 SE 4.5 165, 000 - It runs!