What's the B-service??The maintenance reminder counts in both days and miles. Every service is due every 365 days or 10,000 miles, whichever comes first.
It counts miles in 100s and days in 1s. So a reading that is -411 means 411 days overdue for a service.
During this time it should also display a flashing wrench. A single wrench is an A service (usually an oil change and an inspection) while two wrenches are a more-involved B service.
Most of the time it means that the owner never reset the maintenance counter.
A B-service (typically at even numbered mileages like 20k, 40k, 60k etc) usually involves more parts and labor. I don't think smart officially calls it that but I've seen it used in European smart communities. Just know that a double wrench service is more involved. lolWhat's the B-service??