No, it doesnt buzz nonstop....there is a 5 or 10 second gap....kind of like if someone is playing with the locks...but the locks dont move....I think its always done it to some extent, I thought it was the power antenna until I traced it to the back fender well in the trunk on the opposite side....It even made the sound after the car was off, and the doors were locked...
I guess if the whole unit is bad, I can order one online here....I hope they arent too expensive....Ill check tonight to make sure its not the actual hose...
1998 ML 320
1994 Blue C220
Im going to Grad School @ the University of Iowa