I've just purchased a 2004 ML270cdi from my local Mercedes Dealer. Mileage 18k

The service records shows that it was last serviced in Sept 2005 with 8900 miles recorded. I thought the dealer would have serviced it before delivery. The onboard computer shows service is due in 6600 miles.

Does anyone know if there is a default timescale between services?

Surely it must have been serviced at 18 months old because of this fact, but dealer says that there are no parameters set down. I don't believe him!