Larry, good news, you can most likely program the traditional one-door-opened-all-unlocked set up (also known as one-press-of-the-button-unlocks-all).

My 2001 E-class was programmed this way per my request during PDI but if I remember correctly, the manual explains how you can do it yourself.

It's so much more convenient!! I also disabled the night illumination feature (mister-you-left-your-lights-on) and the speed-sensitive-volume control..