mb230e

I HAVE JUST AQUIRED MY 230E APPARENTLY 104.000 MILES BUT WITHOUT HISTORY AND WONDERED ABOUT FUEL, IE UNLEADED OR LEADED AND ABOUT OIL IE ANY BENEFIT FROM USING SYNTHETIC OR SEMI-SYNTHETIC? IS THE REAR CHASSIS LEG ROT COMMON AND ARE THERE ANY OTHER COMMON FAULTS TO WATCH OUT FOR ALL COMMENTS...