416cdi

hi, my sprinter has a vibration that occurs at about 25-30 mph that feels like it's coming from the auto gearbox. has anyone got any ideas what it could be and a solution to fix it?

I own a Sprinter 416CDI 4X4 LWB HR Crew Van which has 5" x 15" rims currently shod with 195/70 rubber (twin wheels on the rear). I want a higher profile tyre & want to know what tyre I can use? I need to consider: 1. The tallest tyre possible to give good ground clearance & slightly...