I found the seat belt buzzer especially annoying because I like to turn on the key and then buckle my seat belt (by the time I have the door locked and the belt on, the pre-glow cycle is over and I can start the engine). I got tired of listening to the darned buzzer and disconnected its switch.

There's a two-pin plug/socket on a cable under the front of the driver's seat. It's connected to a switch in the seat belt. Unplug it and you will no longer have a seat belt buzzer but the buzzer will still work for "key in ignition" and "lights left on."

__________________

"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