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Updated on September 27, 2023 4:01 am
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Updated on September 27, 2023 4:01 am
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Updated on September 27, 2023 4:01 am

How to Change Battery in Mercedes Key Fob

If your Mercedes-Benz is having difficulty starting, its key fob battery could be at fault. Here are some signs it might be time for replacement so you can take the necessary steps.

Change the battery in your key fob is a straightforward and inexpensive process that should only take minutes. No dealership visit required! Plus it saves money!

Get the Right Batteries

Mercedes key fobs are an invaluable tool, allowing you to lock and unlock doors of your vehicle without ever touching the keys themselves. Unfortunately, over time their batteries will run down, necessitating replacement.

As part of your battery replacement journey, it is important to first identify what type of key you have; this will determine how you go about changing them out and whether or not finding compatible batteries is easier.

As an example, Chrome Smart Key users only require one CR 2025 battery while older Smart Key models require two. Furthermore, key types also impact how to access their battery compartments.

If you possess a Chrome Key for a newer Mercedes, simply pull the tab at the bottom of the battery compartment to release its cover, insert your key into its narrow end of slot to remove outer cover, then insert new battery inside compartment.

Noting the number on each battery will help you identify which is suitable for your key fob. Modern CR2025 batteries feature their plus side facing upward, while older CR2032 ones will have their negative side positioned below.

Once you have all of the appropriate batteries ready, it’s time to assemble the device. Be careful when placing each battery into its respective slot as placing them incorrectly can render keys inoperable.

Mercedes-Benz vehicles feature many different key fob options that vary in terms of size, shape, function and even panic button functionality.

Attempts at starting your vehicle fail on the first try or take several attempts; this could be an indicator that the key’s battery has become low. Unable to lock and unlock doors or set off panic alarm are other indicators of imminent key death.

Determine Your Key Type

Before changing the battery in your Mercedes key fob, the first step should be identifying its type. Mercedes-Benz uses two main types of keys that require specific sets of batteries – this can help speed up the process significantly.

Your key fob will require either two or three CR 2025 batteries depending on its design. Two battery versions are referred to as Smart Keys while those using three batteries are known as Chrome Keys.

The Smart Key not only operates all doors and trunk locks, but also features a panic alarm feature to warn if anyone attempts to enter your vehicle using its key – providing added peace of mind to both yourself and your family. This smart protection measure helps safeguard family lives.

To open the cover, pull down on a silver-square tab at the base of your key. This will separate it and allow you to remove your old battery.

Once complete, it’s time to install a new battery – make sure both its positive and negative sides face inward when placing it into its slot.

One indication that it may be time to replace the battery in your Mercedes key fob is when you experience difficulty starting your car or losing the ability to lock and unlock its doors. These symptoms could indicate a worn-out battery; if any are present for you it could be time for change.

If your dashboard displays a “Key Fob Battery Low” light, this indicates the need for new batteries. The system constantly monitors the output voltage from your key fob and when it detects issues with its batteries it activates an “Key Fob Battery Low” warning light.

Mercedes-Benz key fob batteries are constructed of long-wearing plastic and may need replacing eventually. If you require assistance in changing them out, contact Mercedes-Benz of San Antonio’s service team – they are here to provide answers and solutions when they are most needed!

Pull the Latch

If your Mercedes key fob has shown signs of dying, changing its battery immediately could save both time and money by avoiding trips to dealerships or mechanics in West Des Moines.

An ageing key fob battery can become nonfunctional over time and cause several issues, including weak responses to push-button start systems or decreased range. A dead battery may even trigger dashboard warning lights that indicate issues with charging systems in your vehicle.

Step one of changing a Mercedes key fob battery involves pulling open its latch. This will allow access to its battery compartment and remove old batteries easily.

Replace CR 2025 3-volt batteries – which is standard size for most car key fobs – at your local grocery or hardware store in a flat, silver package.

Once you have the appropriate battery in hand, simply follow these simple instructions to change it on your Mercedes key fob. If you need assistance choosing which battery type or size is the right one for you, reach out and let us help you select a size!

If you own a Chrome Key, the process for unlocking is slightly different from unlocking Smart Keys. When working with a Chrome Key, look for its square-shaped silver tab located on its bottom surface.

Gently pull the tab until it releases and a small gap appears, then use your key to press into this gap to open the cover and swap out old battery for new.

Once your battery is securely in its place, you can reassemble your Mercedes key fob. You may do this at home if you feel confident, or leave the job to our service center in Warwick – either way these steps will ensure a reliable Mercedes key fob quickly!

Open the Battery Compartment

Your Mercedes key fob’s battery is an integral component, so when it goes dead you may experience difficulty unlocking or finding your keys when needed most. Luckily, replacing its batteries should be straightforward; just be sure that you understand its structure prior to dismantling it so the job gets done properly!

A smart key is a modern electronic cylinder equipped with two CR2025 lithium-ion batteries. These small flat silver batteries are widely available at grocery and hardware stores and must be of high-quality from reputable manufacturers if you want your treasured accessory to last as long as possible.

To open your Mercedes key fob, there are various methods you can try. For instance, smart key cylinders feature two small screws which need to be unscrewed with a standard Phillips screwdriver; this will enable you to unslide it without damaging the electronics. Finally, patience may be key; especially if dealing with complex fobs. Luckily, our team at Mercedes-Benz of Fairfield can offer invaluable assistance in terms of key fob complexity – they have extensive knowledge in dealing with them!

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