sl500 1994 remote access malfunction
 

My SL's remote control system has problem opening and closing doors and trunk during daylight hours, but once night falls the remote system begins to work fine. I purchased a new remote key and also replaced the trunk's actuator which was failing to function, the problem remains. A technician suggested that it could be that the doors and trunk lenses are too old and not receptive enough when the light is hitting them. What do you suggest? Thank You Kindly, PEP