Parkers overall rating: 3.7 out of 5 3.7

Miles per pound (mpp) Miles per pound (mpp)

Petrol engines 3.1 - 3.7 mpp
Low figures relate to the least economical version; high to the most economical. Based on WLTP combined fuel economy for versions of this car made since September 2017 only, and typical current fuel or electricity costs.

Fuel economy

Petrol engines 23.5 - 27.4 mpg
  • Not a cheap car to buy or run
  • S500 is the most reasonable
  • AMG cars will prove far costlier

The Mercedes-Benz S-Class Cabriolet is not going to be a cheap car to insure, tax or fuel, whichever of the three variants you choose.

Cheapest road tax comes courtesy of the S500, which is also the most frugal with a promised 32.5mpg. Pick the S63 or S65 and this number drops to 28mpg and 23.5mpg respectively, along with a hike in VED costs.

Regardless of which badge your S-Class comes with, you can expect that fuel economy figure to plummet if you drive it the way it was intended to be driven.

The Mercedes-Benz S-Class Cabriolet is not a green car. Even the S500 puts out 204-212g/km of CO2 (depending on wheel choice) and the AMG cars clock in at 237g/km and 272g/km for the S63 and S65.

  • Solid build quality
  • Lots of gadgets to go wrong

Mercedes-Benz has a good reputation for reliability and while the S-Class is often seen as a groundbreaker in terms of technology, lots of the gadgets used here are present in many other cars too.

The only major recall for the S-Class as a whole so far is for the stop/start system, and the AMG powerplants are hand-built with a meticulous attention to detail.

Ongoing running costs

Road tax (12 months) £360 - £520
See tax rates for all versions
Insurance group 50
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