Vauxhall’s teaser picture of its new mid-size convertible so offended our design sensibilities that we felt compelled to fix it – what use is half-a-picture when we can already guess how the rest is likely to look?

It’s closer to an Insignia than Astra Convertible, but to add a bit of pizazz, Vauxhall have called it Cascada.

Cascada is a Spanish word meaning waterfall, but it’s also the name of a German Eurodance act fronted by singer Natalie Horler – you’ll recognise their huge 2009 dance hit, Evacuate The Dancefloor.

Horler famously ‘removed her top’ in last year’s German edition of the magazine, making us wonder if perhaps those cheeky product managers at Opel’s Rüsselsheim HQ had other things on their mind when naming it..

The Cascada marks Vauxhall’s departure from the compact cabrio sector, with which it enjoyed much success with cars like the Astra Mk3 Convertible and the more recent Astra Twin Top. The Cascada is a full 225mm longer than the Astra Twin Top (which was discontinued in 2010) and now targets rivals in the mid-size sector.

At 4.7 metres in length – more than 70mm longer than Audi’s A5 Convertible – the Cascada features a full-size fabric roof, giving the car an elegant profile. The roof can be opened or closed at the touch of a button, at speeds of up to 30mph.

While our photoshopped picture above is enhanced with Insignia design-DNA, the Cascada looks like featuring its own unique front and rear lights, while the bodywork most likely sits on an Insignia chassis.

Although revealed in advance of this month’s Paris Motor Show, the Cascada will not be on show. Instead it will be revealed later on in the year, before going on sale in early 2013.