Radio/tape Cd Player problems of the 1997 Mercury Villager

We started reporting the problem with the sliding door on 7/15/99. The lock did not lock or unlock consistently whether using the remote or the inside automatic button and the door rattled like something was loose inside. The service dept at capitol Lincoln Mercury(richmond, va) decided to replace the antenna on 8/16. This did not correct the problem. On 10/4, I took it back again and they replaced the sliding door lock actuator. This corrected the problem with the door locking/unlocking but now, the child safety lock is stuck and the door still rattles. ****I initially reported a problem with the steering wheel shimmeying and the brakes grabbing on 8/16. They reported the brakes were okay - 5mm. I had the tires replaced and aligned which took 3 days because they didn't realize that they only had 3 tires. The steering wheel continued to shimmey so I took it back on 10/13. The weights had fallen off so they had to rebalance the tires. They also stated the the vibration when braking would be fixed by turning the front rotors which they did. They stated that with the turning of the rotors that I should replace my brakes which I did. . . For $55. 83. The next day, 10/14, I took the van back because it sounded like something was rubbing under the car. This problem was corrected by replacing the rotors that they turned the previous day. Currently, the steering wheel still shimmies just not to the extent as before. I'm taking it back again on 10/20.