It's not until a bitterly cold day that the brilliance of heated armrests is appreciated. Standard equipment in the all-new 2015 Mercedes-Benz S-Class Coupe, no other feature summed up the innovative yet oh-so indulgent comfort of this particular S 550 4MATIC Coupe as those armrests, invisibly nestled into the doors and atop the storage bin between the hot-stone-massage-capable front seats.

Two-thirds of the S-Class Coupes in Canada are go-fast AMG models, which underpin the performance edge Mercedes-Benz highlights in its largest two-doors, while the base S 550 seems more intent on delivering the two-door's promised "breathtaking" style. Starting at $147,500, there's more visual romance to the lower and shorter S-Class Coupe than the more formal and upright S-Class Sedan, with this particular S 550 Coupe all-wheel-drive tester bedazzled with optional Swarovski crystal LED headlights ($4,000).

Then again, the S 550 Coupe also starts at a $47,300 premium over the more functional S-Class Sedan: two more doors, a fifth seat in the back compared to the Coupe's four and 130 extra litres of cargo space (530 versus a compact-car-like 400). The price gap shrinks when the more generous standard equipment of the coupe is factored in, but as with many high-style items, there's a steeper premium on panache than practicality.

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Unfortunately for the S-Class Coupe, style is not a strength when measured against its most sporting rivals: the Aston Martin Vantage, Jaguar XKR Coupe and Porsche 911. Even considerably less expensive luxury coupe rivals such as the Cadillac ELR and Lexus RC F make bolder and more alluring visual statements – and both for about $80,000. Sure, these other cars are basically two-seaters with two tiny seats stuffed in back, versus the S 550 Coupe's generously heated and adjustable rear thrones. But these sporting machines also make up some of the most seductive-looking grand touring luxury coupes on the planet.

This S 550's strengths lie in its cosseting comfort and Bentley-rivalling quiet, plus innovative safety and convenience technologies. And none of those other coupes leads the driver to gleefully anticipate red lights – the perfect time to lean back and place fortunate forearms onto those heavenly heated armrests.

You'll like this car if ... You'd like Bentley power and pampering for Mercedes-Benz money.

TECH SPECS

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RATINGS

The Verdict

8.5

Most of the same innovative features are available on the more practical S-Class four-door, at a much more reasonable starting price and with a fifth seat; but amongst luxurious coupes, it's certainly the most tech-heavy, plus one of the few with an adult-friendly rear seat.

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