The 2015 / 2016 BMW 7-Series has been caught undergoing testing on and around the Nürburgring.

The 2015 / 2016 BMW 7-Series has been caught undergoing testing on and around the Nürburgring.

Still heavily disguised, the redesigned flagship has an evolutionary appearance which will likely draw cues from the Vision Future Luxury concept. We can't make out of lot of details but BMW Chairman Norbert Reithofer has previously said we shouldn't expect anything too radical as he believes a "major design change" would be "wrong" for 7-Series customers.

While the exterior styling will likely be conservative, Reithofer has said the model will set an "example in terms of weight reduction" thanks to "intelligent composite construction." That's pretty vague but the Vision Future Luxury concept had a carbon fiber and aluminum chassis and previous reports have suggested the model could weigh 450 lbs (204 kg) less than its predecessor.

Engine options will likely include the usual suspects but there have been rumors about an entry-level model with a 2.0-liter four-cylinder engine and an M770i xDrive with a twin-turbo 4.0-liter V8 that develops 475 bhp (354 kW) and 480 lb-ft (650 Nm) of torque.