The upcoming Opel/Vauxhall Astra, scheduled to go on sale at the end of the year, has been caught without camouflage at GM's German test facility

Eagle-eyed spotters near GM's testing facilities in Germany have caught the new Opel/Vauxhall Astra testing without camouflage. Scheduled to go on sale at the end of this year, the new Astra is currently in testing. The vehicle in the photos is a styling prototype, but clearly shows the Astra's new lines. The window treatments and rear window are visible in the photos, sections of the car that have been heavily disguised in previously captured test mules.

The updated Astra is expected to be somewhat more sophisticated than the current model, with refined suspension manners and more upscale appointments inside.

Underneath the skin, we know that the new Astra rides on GM's all-new Delta platform, which is shared with the upcoming Chevrolet Cruze and will be used on mid-size cars like the Chevy Volt and Vauxhall Ampera. A full line of gas and diesel engines is expected, and a hybrid version with the second generation of GM's mild hybrid system on board. The new Astra's interior shows influence from the larger Insignia in its three-gauge instrument panel and wraparound dash trim.

Gallery: New Opel Astra Spied Completely Undisguised