Now that's kindof a chuckle... the dealer service department charges the dealer internally for the inspection time and internally for the cost for any required service needed to bring vehicle to MB spec, example if tires are required, brakes, etc + with inspection results to MB spec - Mercedes in the US charges the dealer for the added 12 month warranty on top of any remaining new car warranty, which also removes the mileage cap overall - for roughly $800-$1400 depending on model..... as compared to 3rd party extended warranties ... a value actually in my opinion.
"Price jumps"...now that's subjective depending on model yr/mileage/remaining new car warranty and added value of the updated warranty in the buyer's mind for the vehicle... for many buyers and many vehicles... fits very well..