I have always heard to use genuine MB hoses and this has come from many sources. I guess they really last longer and possibly give you a hint of failure (bulging) before failing.
Don't forget how many you have:
- supply & return at radiator
- supply & return at heater core
- supply & return at F.I. Pump thermostat
- supply to overflow/pressure tank
- thermostat bypass
Did I forget any?
Rodd
Powell, Ohio, USA
1966 230SL, Euro, Auto, Leather, both tops
1994 E420