320 Merc. Did you not have enough time to list the year and the full name of the vehicle. Is this a 320 Mercedes or a 320 Mercury? Merc is short for Mercury. Benz is short for Mercedes Benz. Also do you not have an owners manual that you can open and read?
Stand on the roof.Unbuckle your old belt and slide it through the belt loops of your pants.Toss old belt aside.Slide new belt through the same belt loops you took the old one out of.Buckle up and you're good to go.