These may not be problems, but rather "features" of the car.
1 - Under what conditions will the doors lock on their own? They are supposed to automatically lock on their own if unlocked with the remote and a door is not opened within 30 seconds. This may also be true with the key as well, I'm not sure.
2 - The radio is supposed to stay on for 10 minutes after the ignition is turned off if a door is not opened. Opening a door should shut off the radio.
I recall on my 2003 if I turn the engine off, but do not remove the key from the ignition, the radio will play, however, as soon as I remove the key from the ignition the radio will shut down.
You can also turn the radio on when the key is not in the car. If the radio was left on when the car was turned off, you turn the radio off and then back on.
As for the door look, it could be a bad drivers door latch.
But again, you need to clarify when and under what conditions your door(s) lock.
The doors should also automatically lock once you hit a few miles an hour as well. Autolock when driving. If the autolock is intermittent, likely you need a door latch replaced. Usually the drivers, but cold be the passenger.
FYI, my 2003 convertible is on its 3rd latch in each door!
If it's raining when I'm driving and park, get out, shut the door - the doors will lock right away on their own. Also when ever I open the door to get in the car the interior lights never come on. But they do when I open the door to get out. Also at times when I unlock the door with keyfob pull handle to open door it will get hung up and I have to shut door and reopen it and it will open normal.
As for the radio staying on with the keys in the ignition - I have parked the car, turned it off, get out leaving keys in the ignition and shut the door. An hour later go back out in the garage and the radio is still on. Pull the keys out of the ignition and the radio turns off.
I'm thinking door switch is bad but unsure about the radio. I've other posts and thinking it wouldn't hurt to change it. Is this the same switch that was posted in the tdi group that I can buy from radio shack?
You have the classic door latch symptoms. The radio should shut off when the door is opened if the latch is working properly. The problem is usually just the solder joints and not the actual switches. I had to do this to my driver's door latch myself. Here is a DIY link:
You don't need to remove the glass completely like is shown. Use duct tape to hold the glass in the up position after it is detached. Cover the door frame with rags so the tape only sticks to the glass.
Thank you Red! When the weather warms up I'm going to give this a shot. The links are very easy to follow so should be easy enough. Although I've never soldered before, I'm willing to give it a try. I don't have a manual for this bug...the only one published is a Bentley and right now I can't justify $130 for one. Luckily there are lots of DIY tips on here to get me though!