When I bought my 300TE-24 ( it was a 'spares or repairs' car out of a breakers , and I didn't pay a lot for it ) , it was showing , from memory , something like 165,000 miles with no service history or anything to either support or contradict it .
When I received the V5 document , I was pleasantly surprised to discover that it had been a one-owner car and proceeded to contact the previous owner who had bought the car new - alas , he had no history either but told me the car had been serviced from new by MB Glasgow . Since I knew some of the guys there , I went in and they kindly agreed to print out the history from their computer . In between , I had been into Merparts with the car and Steph told me the mileage was wrong , as he had worked on the car , during his time with MB Glasgow , seven years earlier , at which time it was 'well beyond 200K' ! When I finally got the history printout from MB Glasgow , there was everything from the original PDI , up to 380K , at which point it was shown that a new speedo head had been fitted , then mileage went back to (IIRC) 123K and continued from there . I kept the car for another year or so until it was written off in my driveway ,by which time it had done AT LEAST 430K !
Since the car drove extremely well and never missed a beat - I viewed the huge mileage as something to be proud of , rather than something to be annoyed about .