It looks like somebody had a few laughs giving this USB and having the recipient think it was actually a real Mercedes-Benz key fob, if only for a brief moment. However, in order to pull off ...

The key fob for most Mercedes-Benzes manufactured since 2003 is pretty much standard looking between all models, but we decided to show you how changing the batteries for a W211 E-Class looks like.

Of course, programming a key fob won't take all day — but it's not a quick fix either. The time required to reprogram these devices depends heavily on factors like the vehicle's make and model ...

If you're looking to pick up a new key fob, or repair one, you might wonder how long programming it takes and whether or not you can do it yourself.