My Battery drains occassionaly in my 81 240D. I had my alternator tested and it tested OK. The car runs fine otherwise. The only other thing I have noticed is that the Break Pad light and the break warning light comes on and stays on at low RPM. These lights go away when I increase the RPM. Could there be short in the break warning system or is it still the bad alternator and the regulator that is causing the the break light on the dashboard to come on?