I have a 2016 envision and the stop feature works but the auto start feature doesn't work! this piece of junk has been to the dealer 6 times now and they say they won't fix it unless it happens to them on a service test drive. It is very dangerous to be stalled out at a traffic light that has turned green! This car has only 8,000 miles. We are the original owners, Our Buick sales dept. offered us 1/2 of the purchase price on a trade. (WHAT A KICK TO THE NUTS) Do yourself a favor and don't buy one of these Buicks! I have been a G.M. customer for 30 plus years, this 2016 Buick Envision and G.M. lack of support (they don't give a dam if anybody is hurt or killed) will be the last dollar I ever spend on G.M. They lost me forever! And I will share this story EVERY chance I get! What a lousy vehicle/manufacturer!