Sorry this is a bit of a newbie question
I'm in the processes of buying a '99 E320CDi with about 90K on the clock. This currently has FMBSH and is due its next service in about 1000miles which the dealer (independent) will do before delivery.
In the long term I don't expect to continue the MB servicing but I want to know if there are any important warrantees (e.g. rust) that would be invalidated by not using MB servicing and so specifically if it is worth doing at least one more MB service in case any issues come to light in the first months of ownership.

I'm in the processes of buying a '99 E320CDi with about 90K on the clock. This currently has FMBSH and is due its next service in about 1000miles which the dealer (independent) will do before delivery.
In the long term I don't expect to continue the MB servicing but I want to know if there are any important warrantees (e.g. rust) that would be invalidated by not using MB servicing and so specifically if it is worth doing at least one more MB service in case any issues come to light in the first months of ownership.