Mine has just hit the 110.000 miles marker, I bought it with 67,000 miles on the clock. In that time it has been serviced regularly, and has done no rough riding at all..... well except for the 2 trips to and from Ukraine across Europe (approximately 5,000 miles each trip), and their roads are a tad rough.

In my limited knowledge of cars, I tend to think that because the noise is related to the car moving, then it must be drive train, and the fact that the clunk seems to clunk faster as the car moves faster also points in that direction.

The mechanic that I use is an old school mechanic, and he has checked everything, drive shafts, universal joints/CV joints, brakes, just about anything that moves when the car starts to roll..... there is really only the gearbox or transfer box left. Do the gearboxes and transfer boxes split on the e70 or are they like some 4x4s where they are a single unit?