> Yes, you must be careful with those Blaupunkts!  The two I've owned
> could be removed by inserting either a special tool (though four nails
> will suffice) into the holes on the sides.   The tool (or nails)
> depress spring loaded clips on the side allowing the unit to slide out.

You can also remove the ashtray, reach in and manually depress the clips.
-Ron Salmon
 The Bus Depot