Hi every one.

i have Lexus GS 300 Model 2009. it have 225000 km on the clock. very solid drive so far. recently it has started acting up like when i tried to enter the car (with key fob in my hand or pocket) the doors does not open. both the batteries in key fob and in the car are new. then i opened the door with mechanical key and pressed the brake with the key near to the start/stop switch it did not started the car. neither it turned on the green light in the start/stop button. its like car did not detect the key fob. i had to manage my office trip on my brothers car. when i came back in the evening and tried to start the car it opened normally and started normally. after 3 days same thing happened car did not start in the morning but it was fine in the evening. let me tell you our weather here in saudi temperature in the morning is approximately 15 degree Celcius with heavy dew and my car is parked out side. the problem occurs in the morning only when its a bit cold with dew. its ok and normal when its sunny and dry. i have get the key fob cecked and its perfectly ok.
any help what can be the problem.?

Thanks,

Asif Naveed