If you bought a new car and are confused what the "M" means on or near your gear shift, don't worry. Here's what is, what it does, and when to use it.

Get your car to around 20 to 25 mph before you shift to D3. At this point, slightly let off the gas when you shift. If you don't, you may damage the transmission.

When you put your car in D3, that means you've set third gear as your highest setting, whereas you can reach every gear of your car in D. Basically, D3 is used when you're driving uphill, downhill ...

Car Gear We Use, by the Staff of Hearst Autos; That includes tools for working on vehicles, aftermarket products for improving them, ... Until then, I plan to look cool as hell behind the wheel.