clk 209 help please

[rinker]

i have just bought a 2003 clk convertible, the 209 series and the only way i can open the door is by holding the key fob on the drivers door sensor but it does work every time but i do have to be close to the car, my radio reception seems fine and i have both key fobs and both have new battery's, it is driving me nuts. Any ides what could be wrong. having a 16 month old baby is making it hard to use the car.
thanks.

[sagt550]

The W209 has two modes of opening the car - radio and InfraRed (I believe). So maybe the radio part of it is knackered and it is relying on the IR mode (i.e. hold the button down and it opens the doors/windows). There is an IR sensor on the drivers handle...