As a previous Smart Roadster owner (had 3 over a 17 year period), I picked this up around 2004 when looking at a Roadster in the Derby Mercedes Benz showroom.

It's an original promotional music CD produced to help promote sales of the then new Roadster & Roadster Coupe.

In it's original case and in good condition.  Probably one for the Roadster enthusiast/collector.  Hard to come by now. Seen them sell for £50 in the past. No others currently being advertised.