Lane departure warning/lane keeping assist buttonMost new and recently manufactured cars have a lane departure warning system to let drivers know if they drift out of their lane while on the road. Most systems use a camera to monitor the road ahead and will issue the driver an alert if the car starts to move out of its lane without signaling or steering. Many newer cars also pair this with a lane keeping assist function, which can automatically adjust the steering to keep the car in the lane if the driver doesn't respond.While it's a useful feature to have, particularly on long road trips or early morning commutes, it's not foolproof, and in some cars, it can occasionally trigger false alarms. Sun glare, unclear road markings, bad weather, and obstacles like tunnels are all known to cause issues with some lane departure warning systems, so it's worth knowing how to turn it off in your car.Most cars equipped with the feature have a dedicated lane departure warning/lane keeping assist button, which looks like a car traveling between two lines. It can often be found on the steering wheel. Pressing and holding the button will usually turn the system on or off, but the exact function will vary between car makes, models, and the type of system your car is fitted with. Like all the buttons here, the best way to check exactly how your car's system works is to read the owner's manual.Voice command buttonMany cars have some kind of voice control system, although the specifics will vary from car to car. Some systems rely on the voice recognition features of Apple CarPlay and Android Auto, and require a smartphone to be connected to the car in order to function. In other cases, manufacturers have their own built-in systems that can be used independently. The trigger for voice commands will also vary between manufacturers. While some can be activated by saying a trigger phrase — BMW's is "Hey BMW," for example — others require the driver to push a button to get the car to "listen" to a command.Manufacturers like Mazda and Toyota produce popular car models that rely on voice command activation buttons, usually marked with a symbol that looks like soundwaves coming out of a person's mouth. On some Mazdas, the same button can also be used to pick up calls if the car detects one is incoming. Once the system has processed the request and begins to give the driver a dialogue response, that dialogue can sometimes be canceled by pressing the button down again.Rear window defroster buttonUnlike some other buttons, there's no single, commonly agreed-upon place within a car's dashboard layout where a rear window defroster can usually be found. Instead, you'll need to look for the logo — which stays very similar across most modern cars — on a button that could be anywhere between the side of the steering wheel and the center console. Most will feature a small light within the button that illuminates when the defroster is on.Modern defroster systems work by pumping electrical current to small wires embedded within the car's rear window, which heat up and melt the ice coating the window's surface. Most systems will eventually turn themselves off after a set period, so unlike the A/C, you shouldn't need to worry about remembering to turn off the defroster after you've turned it on. Turning the car off will also automatically turn off the rear window defroster.Auto climate control buttonIf you spot a button near the climate controls that simply reads "Auto," it means your car has automatic climate control. It's the simplest way to keep your car at the temperature you want it — just set the desired temperature, press the Auto button, and the car's system will work to maintain that set temperature. The system will automatically control the car's fan speeds, the level of cabin air intake, and the A/C, and will increase its cooling capacity if it detects that the cabin is exceeding the target temperature.Some cars also feature multiple climate control zones, so the driver and passengers can set different target temperatures. To reset each individually configured climate zone and revert to a single target temperature for the whole car, a separate "Sync" button can usually be found near the "Auto" button. An indicator light is usually built into each button so drivers can see at a glance which features are enabled.