You'll have to be quick to get a limited-edition Mercedes CLS AMG. Only 55 examples of the IWC Ingenieur - built with Swiss watch maker IWC Schaffhausen - are to be sold. They get 19-inch alloys, AMG seats and a bodykit. Power is from the stan-dard car's 476bhp 5.5-litre supercharged V8. Likely price is £80,000-plus.