I got the opportunity to review a 2012 Mercedes SLK- and was pleasantly surprised by it- especially as it was a diesel!
https://fuguttycars.wordpress.com/20...a-super-salon/
Think there would definitely be scope for considerable hypermiling on the 2.2 4cyl as fitted this car- the 200+bhp and 368 ft-lb of torque it makes stock would bee easy to utilise. the 7 speed auto may be more troublesome