Development work continues on the 2015 Audi A7 as our spies have caught the model undergoing cold weather testing.

Development work continues on the 2015 Audi A7 as our spies have caught the model undergoing cold weather testing.

Snapped wearing swirly camouflage, the facelifted hatchback has modified bumpers, a revised grille and new Matrix LED headlights. The changes are less noticeable out back but include an angular exhaust tips and updated taillights.

Engine options remain unconfirmed but will likely carryover. However, there could be a new a 3.0-liter TDI V6 that produces 258 HP (190 kW).

The A7 facelift could be introduced later this year so look for a possible debut at an upcoming auto show.

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Audi A7 facelift spied showing new details