My CLK 320 coupe 2006 has developed a central locking and radio reception problem. From what I can gather it is most likely the antenna amplifier, what I cant work out is it's location, is it attached to the rear screen, the C pillar passenger side or under the dashboard at the front or all of the above. The IR is working ok as is SAT NAV and CD changer. Sorry to be a pain I know this has been discussed to death now, but can't seem to find my exact model, and as I am not keen on electrical problems hopefully want a few pointers in the right direction / area. I would be most grateful for any assistance.