w123 automatic

Hi, I have a 1984 W123 230e. I'm only getting a few hundred miles on a new fanbelt before it starts to fray and squeal. Three different mechanics have checked it and don't know why it's doing it. The last guy suggested it might be the modern universal belts that they are using and suggested...

I recently aquired a W123, 1985 230e Automatic. I have the following problems: 1. She only shifts to second gear when in "D", or the lower gears 2. Gearbox / Diff makes a loud "clanging" noise when you drive slowly and gears shift up. I`m not a merc fundi as this is my first. Any ideas?