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How to Fix a Smart Fortwo Key Fob A smart key fob packs many handy features into a tiny hand-held device. It can be used for everything from locking and unlocking your car to activating the vehicle with just pressing a button. Keeping your smart keys in good working condition is vital. You can easily replace the batteries yourself if you notice they're low. Unlocking Many of us use key fobs as a convenience, but it only takes a few seconds to realize the value they provide. These handheld devices allow us to unlock our vehicles and provide remote-start systems. They even help to ensure our safety by emitting an unique electronic code when they connect to the car's antenna. While there's a lot to love about the basic key fob, it can sometimes be a bit annoying when one malfunctions. The good news is, some simple fixes can often bring back the functionality. Many carmakers offer do-it-yourself (DIY) key fob programming instructions in their owner's manuals, and the process is usually fairly simple. Some automakers offer this information via their websites. Before you begin your journey, it's best to have an additional working fob or key available particularly if the one you have been misplaced. If you haven't done it already, purchase and program an additional one and store it safely. If you're trying to reset your smart key you can try getting out of the vehicle and walking a few feet before returning to the driver's seat and trying again. Most smart fobs can be programmed by connecting them to a smartphone or computer and using the software on most automotive manufacturers websites. If you're not able to make your key fob function after following the guidelines of the manufacturer, you can contact your local dealer for assistance. It's important to use the best battery for your smart key. The batteries that are not of the highest quality will last less and may be drained too quickly. To extend the life of your smart key, make sure you replace the batteries regularly. Before removing the old batteries, read the manual of the manufacturer and select one that meets the unique requirements of your model. Many smart keys are pre-set with some settings that will automatically adjust to the driver's preferences. If the key fob was detected for instance the vehicle could adjust the seats and mirrors to the proper places. You can also program climate control settings, radio presets, and speed limits for certain key fobs to avoid unauthorized use. Some Chevy and GMC vehicles let you fold your side-view mirrors remote via the key fob. This can be useful if you are trying to maneuver into a tight space. To activate this feature, press the lock button for 10 seconds on the key fob. If you're shopping for a new car, talk to dealerships about this feature and other cool features of the key fob. Starting Key fobs are used to unlock your vehicle and activate your car alarm. Certain key fobs can be used to start the engine, and manage other vehicle features, such as air conditioning or heated seats. These remote-start capabilities make the key fob a valuable accessory for any vehicle, and is particularly useful in places where it is difficult or even dangerous to use a conventional key. Many of us have a difficult to remember to turn the ignition key to start the car, particularly when we're in a rush or distracted. The panic button on key fobs is the solution to this problem. Pressing the fob's panic button activates your vehicle's emergency alert system, blaring your horn and emitting a loud siren that will make it difficult for thieves to escape. In recent times, key fobs have been gaining a lot of attention. They're compact, easy to use, and offer various functions. Although they are not as mobile as traditional keys, most people will sacrifice a smaller size for the convenience and convenience of having their car in their reach. Smart fortwo follows the trend and has a metal key and a fob device that is integrated. To operate your Model 3, you can simply press the key fob's button or tap the touchscreen to unlock your car and activate its features. The key fob can also be a backup if your phone runs out of batteries or is not available. Key fobs are only compatible with one Model 3 at any given moment. However, they can be repaired by another Model 3 by authenticating it again (see Managing keys). After you have successfully repaired the key card or key fob, its name will appear in the list. You can also change the name of an authenticated key fob by touching the pencil icon. If your key fob isn't able to work, a message will appear on the touchscreen to indicate that it needs reprogramming or replacement. Follow the steps in your manual for accessing the key fob's battery compartment and then remove it. You can replace the battery yourself by following these easy steps: Place your key fob button-side down on a smooth surface and gently lift the cover away from the clips that hold it. Avoid touching the battery's flat surfaces as fingerprints can eat away its lifespan. Most major retailers and auto parts shops have CR2016 coin-cell replacement batteries. Choose a brand that provides warranty against batteries that fail.