Friend of mine has an R-reg E240 (V6 petrol) in dark blue.
Very low mileage, as he does not live here and only visits occasionally. The car is parked in his garage. His father, who used to live in London but since passed away, bought it from an MB employee in Stuttgart when the car was one year old and imported it to the UK.
Not sure though who serviced it so far, but I can find out.
He mentioned sometime ago wanting to sell it, so I can ask him - or is this too old for you?