you could disconnect the door switch, but your interior dome wont light up then either.
Perhaps you can figure out which ground wire on it there are 2 or 3 on the little door pin switch, goes to the buzzer if it does. Then just diconnect that wire, but leave the others.
Might be something to look at.
'92 300CE - Sold
2004 C240 - C7 Wheels
2015 ML350 - P1, Pano, Ash poplar wood, Sport Dinamica interior, Running Boards Keyless go.