On my 300SEL-1988 the Electric antena start draing the battery after I change the Mast. How can I trace the problem? any volunteer!!.
Thank you, Sami

I've no knowledge of your car model, but it sounds like you have a hot lead shorted somewhere, thus leading it to be always on. It shouldn't draw that much to kill your battery quickly, but over time it will. I would check the antenna switch and the wiring to the antenna motor.