All New Mercedes-Benz vans have their service intervals determined by the onboard Service Assyst computer programme.
When the van requires a lubrication service a single spanner will light up on the dashboard and when the van requires a maintenance service two spanners will light up.
The intervals between services are totally dependant on the usage of the vehicles and the strain placed on them. Large variations can exist within the same specification of vehicle dependant upon driving styles, types of roads, traffic conditions, usage and equipment fitted to the vehicle. As an example, a generator on a refrigerated van would greatly reduce the service intervals.
As a general rule of thumb, an approximate mileage of 25,000 miles on a van might be expected where no external factors affect the efficiency of the vehicle or its operation.