Short version: All functions work including Blind Spot as expected - direct replacement for OEM. You don't need to remove door panels to install.Long version: Bought a used 2014 Cayenne and noticed afterwards that one window button in the driver side panel was broken. Shortly there after 2 more broke and the driver side window switch came off completely. The others worked but where sharp plastic after the silver broke off. Took a picture to make sure I bought the right one (mine has Blind Spot monitoring switch). Took a couple weeks to get here.Another poster indicated you can remove the old without removing any door panels. (Thanks!). That poster is correct. I used two trim removal tools with long tapers and pushed them in on the same side furthest from the door (two clips per side). I expected the old unit to lift out but it did not and when I removed the tools it wouldn't come out but I noticed it was loose at the back clip. I repeated focusing on the front clip only and when I pulled the trim tool out the unit lifted out easily. Basically, the trim tool broke the clips holding it in. No big deal since I was tossing the entire unit. You can deduce where the clips are by looking at the position on the new one.The connector has a small tab to release and the cable is short so it takes a little figuring how to hit the tab but in the end was easily doable.Total installation time was about 5 minutes.Plugged the connector into the new unit and pushed the unit into the opening until it clicked. All buttons function as expected. Auto up/down and manual up/down. Mirror adjustment/mirror fold. Didn't try rear window lock function but assume it works. Rear window shade function worked as expected.Worth the money and my fingers aren't in pain from operating the window anymore.Will update if unit fails or otherwise exhibits issues.