The Tiguan was completely redesigned for 2018 (but bizarrely the older tiny model continues to exist – now called the “Tiguan Limited” – and you can see more in the section farther down on this page about it). The 2018 Tiguan is 10 inches longer than the older models – and now has a 3rd row (albeit an itsy bitsy 3rd row).
If you need a 3-row vehicle and it needs to be a Volkswagen, the Atlas is the one to get – the Tiguan has a useless 3rd row that is too tiny to be functional (or safe) and restricted 3rd row access with car seats in the 2nd row which the Atlas doesn’t have due to it’s tipping car seat safe tilting feature for the 2nd row seats. There is also significant seat belt overlap between 2D and 2C in the Tiguan that is much less prominent in the Atlas – not to mention that the Atlas has tether anchors in all 5 positions, which the Tiguan only has in 3, and the Atlas has lower anchors in 3 positions, while the Tiguan only has in 2.
