VW Motorsport have unveiled the 2018 car:
https://scontent-lht6-1.xx.fbcdn.net...0d&oe=5B2D590B
https://scontent-lht6-1.xx.fbcdn.net...c9&oe=5B444720
https://scontent-lht6-1.xx.fbcdn.net...c2&oe=5B33999B
https://scontent-lht6-1.xx.fbcdn.net...36&oe=5B3DBCEC
https://scontent-lht6-1.xx.fbcdn.net...bf&oe=5B2AA0D8
https://scontent-lht6-1.xx.fbcdn.net...41&oe=5B4C2F96
Front bumper looks different, as does the rear wing, but otherwise there doesn't look to be any other cosmetic changes from last year. Seems like the front mounted cooling package has been retained as well.