Bought a 2017 CPO GLA 250 last week. Enjoying it so far except for one small thing. After looking through the manual several times I can't find a way to have the doors lock automatically when I leave the car. The 2017 CX-5 I traded for the GLA had that feature, as does my 2012 Cadillac CTS Coupe. I miss being able to do that, and have had to re-train my brain to either do the door handle lock or push the button on the smart key. Can the wise and knowledgeable members of this forum put this question to rest for me once and for all please? I appreciate any feedback.