Yup! Another sufferer of the squeaky seatbelt syndrome!!! Its so annoying that people sitting as passengers will ask me what's that noise like somethings very, very wrong somewhere? Mercs don't squeak or rattle they say, but mine does. Mine is on the driver's side and squeaks everytime I try to move around in my seat like reaching out to the glovebox, also when I try to work the radio switches or the sunroof or the cabin lights. I only have to move just a bit and it will squeak. No need to turn around and try to reach into the back seat! Haven't found a cure yet, but willing to try anything suggested by you all. Cheers!
1994 C180 and enjoying the hidden problems and curing them.