Radio/tape Cd Player problems of the 2006 Nissan Altima

2006 Altima 2. 5 s that is a lemon customer wants to have the car replaced under the lemon law* the consumer stated the vehicle has no start problem. The vehicle would start up when she began her day, but at unpredictable times. There is a grinding noise under the gas pedal while accelerating as well as when coming to a stop. The dealer stated the vibration/grinding noise was coming from the tires. All the windows and doors will lock and the remote keyless entry does not seem to work. The cd player and radio are not playing properly. The radio has a lot of static. The cd player makes the cd's sound like they are scratched.