2 problems with my s500 that are ANNOYING!

1995 S500 W140 sedan

Whenever I start the car with the radio on, the sound will be off..so i have to switch to another CD or switch to FM and put it back onto the CD so the sound starts up...and if i turn off the radio, the radio will freeze and turn off for 3 days and start back up after 3 days..WTF??? thats 1 problem i can live with... the main problem is:

The keyless entry doesn't work and neither does the entry from the driver side door so I have to unlock it from the passenger side lean forward..anyways and pull up the locks manually ...ANNOYING....so can someone tell me if its possible for a DIY fix/diagnose? i know benz dealer will rip me off and charge me 1000$ more than what the job costs but thats part of owning a benz and i want to get around that if at all possible...

when i press the button to lock/unlock on the key, the lights switch from green to red etc. but the locks dont lock/unlock.... theres something messed up with the entire locking system i believe...b/c even if i press the unlock/lock button from inside the car, it doesn't do anything...same goes with the trunk and gas opener.....

so if i try to unlock the driver side door...it doesn't lift up the lock to unlock it...basically i have to unlock the door from passenger side...and manually pull open all the locks....and to open the trunk, i have to put the key in..turn it to unlock position and push etc... and put it down and turn to lock position to lock....and the hatch/latch thing for the trunk is always out when its suppose to go in..

..i know you guys will probably tell me to just go to the dealer but any other suggestions?

if i have to go to the pro's..whats a good place near either orlando or jacksonville area? thanks alot!