There's the button that unlocks the car's doors and the one that pops the trunk. And then, on some BMWs, the key fob has a button with a diamond on it.

Car owners are discovering a hidden protection function in their remote control key fobs - and it offers additional convenience and security.

Some key fobs have many features built in that owners may not even be aware of. Here's our guide to hidden key fob features.

If you have a key fob with a circle arrow button and its function, here's what it means.

As a result, they fitted it with a Ghost button on the key fob which, if pushed, will bring all movable panels to life.

Apparently, BMW X5 owners who underwent this ordeal may be able to place the blame on the design of their key fobs, as BMW is currently facing down a class action lawsuit for poor design of the ...