Somewhere around that year Mercedes added another "convenience relay." This probably allowed them to delete one of the door switches. This may have also been when the function was added that allowed you to close all of the windows and sunroof by locking the car from the outside and holding the key in the "lock" position for a few seconds.

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"Buster" in the '95

Our all-Diesel family
1996 E300D (W210) . .338,000 miles Wife's car
2005 E320 CDI . . 113,000 miles My car
Santa Rosa population 176,762 (2022)
Total. . . . . . . . . . . . 627,762
"Oh lord won't you buy me a Mercedes Benz."
-- Janis Joplin, October 1, 1970