Signs That You Need Mercedes Key Fob Battery Replacement
Where some key fobs out there have LCD screens now that tell you when the battery is dying, other more basic ones do not have that luxury. Many Mercedes-Benz key fobs, while beautiful and elegant, are still typically more straightforward and analog in their buttons and construction.
If you experience any of the following things, then its a sign that its time to replace the Mercedes key fob battery.
- Signal strength is weaker, meaning that you are only able to open your car from much closer than usual. Normal range is 50 feet, if it doesnt work at 40-50 feet at least, then signal strength is weakened.
- You have to press the button multiple times for it to register, send a signal and open/lock the doors.
- It is working quite well in the morning but then in the afternoon not so well, and continues in this inconsistent manner.
S To Program Mercedes Key Fob
After battery change, or after buying a new key fob, you may need to program and sync the key fob. Here are the simple steps to program the key fob.
NOTE: Some Mercedes key fobs may require special pieces of equipment from the dealer to program.
Step 1: Insert the key into the ignition pot and turn it ON.
Step 2: Turn the key off and remove it.
Step 3: After removing, press and hold the lock button.
Step 4: While holding the lock button, press unlock button 5 times in quick succession.
Step 5: Release all buttons and press the trunk open button once to finish the procedure.
Step 6: Test the key fob and if the key fob does not work, repeat the procedures above.
Can You Start Mercedes With A Dead Key Fob
Yes! Once inside the car, remove the start-stop button from the ignition lock by putting on the button. Plug the key in the ignition hole revealed by button removal. Depress the brakes and turn the key to start the car normally.
When you input the key fob into the start-stop button, an inductive current from the car battery flows to the key fob to enable it to function.
Don’t Miss: Prius Battery Dead After Sitting
How To Change A Battery In A Mercedes Key Fob
Battery Dead? Here we run through how to change a battery in your Mercedes key fob.
1 year, 7 months ago
A Mercedes-Benz key fob is quite the status symbol. It opens some of the most exclusive and luxurious car doors in the world and is quite a statement of your own success and affluence. Unfortunately, the key fob is still subject to the same laws of physics as everything else, and the batteries run out.
As things stand, Mercedes-Benz are yet to invent a special kind of high-end luxury battery that runs 100 times longer than any other pretty typical key fob battery. If you want to replace the Mercedes key fob battery, then youll need to know the steps.
To Change Mercedes Key Fob Battery
The methodology of opening the key fob depends on whether you are using the smart key fob or the chrome key fob.
Replacing the battery in the smart key fob.
Step 1: Pull on the handle at the end of the key fob to remove the metallic key.
Step 2: On the top side of the key fob where you have removed the key, there is a slot.
Step 3: push the key you have withdrawn into this slot and turn it in any direction to open the key fob.
Step 4: Replace the old batteries with the new ones and ensure the new batteries faces the same direction as the old batteries.
Step 5: Replace the cover and press together to lock it. Return the key to the key fob
Replacing the battery in chrome key fob
Step 1: Pull on the handle of the key fob to release the metallic key.
Step 2: Insert the key into the slot revealed after key removal. Turn the key to open the key fob
Step 3: Replace the old battery with the new battery ensuring the battery faces the same direction as the old battery.
Step 4: Replace the key fob cover and press together. A click sound will be heard to signify tight closing.
Read Also: Car Battery Won’t Hold Charge
How To Replace Mercedes Key Fob Battery
The good news is that changing the battery in your Mercedes-Benz key fob is actually a very simple procedure. It should only take you two minutes and you wont need any additional components other than whats in the key fob already.
In order to help more Mercedes-Benz drivers, weve prepared two explanations to cover the newer generation of keys and the previous generation of smart keys. The first description below suits Mercedes cars from 2017 to the present. The second description is useful for Mercedes cars from 2016 and earlier with the smart key.
I Changed The Mercedes Key Fob Battery But It Still Wont Work
If youve changed the battery for a fresh one but are still experiencing problems with the key fob, then you should contact the dealership and test the key fob for a technical fault. Theres a chance that the key fob has an internal component not working, which is stopping the signal from being sent out properly.
You May Like: Replace Battery Hyundai Key Fob
How To Replace A Mercedes Key Battery
Similarly, What battery does a Mercedes key take?
Also, it is asked, How long do Mercedes key batteries last?
between three and four years
Secondly, Can I use 2032 battery in Mercedes key?
If your Mercedes-Benz car was manufactured in 2017 or later, you most likely have the most recent key fob. A CR2032 battery is used in these key fobs.
Also, How much is it to replace a key fob battery?
These batteries typically cost $10 or less, however some fobs need two. Because it simply takes a minute or two, battery specialist shops and dealers often replace the batteries for free.
People also ask, Why does my key fob not work after replacing battery?
To open the key fob and inspect for damaged contacts or misaligned buttons, you may use basic tools. Replace the automobile key fob if that doesnt work. Another reason your vehicle remote may not function after replacing the battery is the lock. Check for these symptoms to see whether the lock or vehicle door has become faulty.
Related Questions and Answers
How Many Batteries Does The Mercedes Benz Key Fob Need
The number of batteries that you need depends on the type of keychain. A Chrome Key is for newer Mercedes-Benz models. There are two versions of Chrome Key: a newer model that needs one battery and an older one which requires two.
To determine what type of Chrome Key have, take note on how the panic button looks: oldest ones have a circular panic button and newer models sport one thats triangular.
The other type of key fob you may have is the SmartKey®, which is made for older Mercedes-Benz models. This key is usually made out of plastic and needs two batteries.
Recommended Reading: Normal Voltage For Car Battery
Where Do I Buy Mercedes Replacement Key Fob
If the Mercedes key fob battery replacement does not work, you may consider changing the remote as it maybe damaged beyond repair. This can be done easily by visiting the Mercedes dealership near you who will have stocks of new key fobs. At the dealership, they will cut the mechanical key and program the fob to work in your car.
The second option is to head online to buy a new Mercedes replacement key fob from the retailers. It will be delivered in 1-2 days and you will visit the locksmith near you to have the key in the key fob cut. You can have the key fob programmed there or you can do it at home by following the guide below.
How Do You Tell Key Fob Battery Is About To Die
The battery of the key fob does not cease just one day. It is a gradual process. The battery produces power by chemical reactions within the battery.
As the chemical ingredients get exhausted with time, the reaction slows down releasing less and less power until when there are no more materials to react and the battery dies.
As the battery gets weaker, the sighs it exhibits include:
- It takes longer to start the engine
- The locking distance becomes shorter and shorter.
- The dashboard system displays a message on the charging system
- The key fob works inconsistently
You May Like: Iphone Pro Max Battery Life
Which Battery Does Mercedes Key Fob Use
The Mercedes key fob uses a CR2025 lithium battery that gives 3volts. The battery is a primary battery meaning it cannot be recharged.
Key fobs for older Mercedes models came with a plastic casing and uses 2 CR2025 batteries. The modern key fobs are metallic or chrome and use a 1 CR2025 battery.
Note: Some older versions of chrome key fobs had a circular panic button and used 2 CR2025 batteries. The newer chrome key fobs have triangular panic buttons.
The battery is designed in such a way that it will last between 3 to 5years before a change is needed. On the shelf, the battery can still be in good condition after 10 years.
The battery can work in varying environments from freezing winter conditions to the sweltering summer months.
What Happens When The Mercedes Key Fob Battery Dies
When your Mercedes key fob battery is dying or at deaths door, then you will notice a drop in its functionality, for sure. As the battery gets weaker and close to death, you might notice that you have to press on the fob multiple times in order to get it to work. When the battery is dead, then the fob wont work at all in any of its functions.
You May Like: Lithium Rv Batteries For Sale
Mercedes Key Fob Battery Replacement
The following simple step-by-step process is all you need to do to replace the battery in these Mercedes-Benz key fobs.
Step 1: Push the small metal button on the back of the key fob and slide the back of the key fob off the casing.
Tip: If you struggle to press the button and slide the back of the casing at the same time, then first press the button to release the valet key. Then, use the valet key in one hand to push the button down while you use your other thumb to slide the fob back away from the rest of the casing.
Step 2: The next thing you have to do is release the battery. It is housed with the inner casing. On the left side of the inner casing, youll see a small tab. Use your fingernail or perhaps a small coin or some other flat object to release that tab.
Step 3: Pull on the tab and the battery will come out inside its own case. Pop the battery out of the case and confirm that the replacement battery you have is the right one. It is normally a CR 2032 3-volt battery. Its a silver-colored disc.
Step 4: Put the new battery in the same place and position in which you found the first one. If you noticed, the side of the battery with the writing should be facing down, and the blank side of the battery facing up.
Step 5: Battery now in place, slide the battery back into the key fob slot, making sure to push it all the way back in.
Step 6: Replace the back of the key fob, along with the valet key .
How To Change The Battery In A Mercedes Key Fob:
Replacing the battery in a Mercedes key fob is a simple process that can be completed in just a few minutes.
Mercedes key fobs use a CR2032 or CR2025 battery, which is a small, round battery that is available at most stores. When replacing the battery in a Mercedes key fob, it is important to make sure that the new battery is inserted in the correct orientation. The positive side of the battery should be facing up, and the battery should be inserted into the key fob until it clicks into place.
- Open the key by gently pushing down on the upper case and rotating it counterclockwise.
- Lift the upper case off of the key.
- On the back of the key, unscrew the battery cover by turning it counterclockwise.
- Remove the old battery and insert a new battery, making sure the battery is facing the correct way.
- Screw the battery cover back on by turning it clockwise.
- Replace the upper case of the key by fitting it over the key body and pushing it down until it snaps into place.
- Push the key fob into the hole on the front of the Smart Key until it clicks.
- The key is now ready to use.
Recommended Reading: How To Change Battery Honeywell Thermostat
How Long Does The Mercedes Key Fob Battery Last
The good news is that you will rarely have to worry about getting a battery and changing it, because those Panasonic batteries last on average between 3 and 4 years. As you can see, the procedure for battery replacement is very simple regardless of whatever model year Mercedes-Benz you are driving.
The 3-volt Panasonic batteries can be purchased both online and at your local Mercedes-Benz dealerships. If youre struggling with the process in any way, those guys at the dealership will undoubtedly offer their assistance.
How To Change A Mercedes Key Battery
This article was co-authored by wikiHow Staff. Our trained team of editors and researchers validate articles for accuracy and comprehensiveness. wikiHow’s Content Management Team carefully monitors the work from our editorial staff to ensure that each article is backed by trusted research and meets our high quality standards.There are 11 references cited in this article, which can be found at the bottom of the page. This article has been viewed 224,623 times.Learn more…
A Mercedes key with dead batteries is no laughing matter. Until you replace them, you may not be able to remotely unlock your car or trigger the car’s panic mode in case of emergency. Although all Mercedes keys require the same type of battery , how many you will need or the method you use to change the battery will depend on which model you have. Compare your key to other models before you attempt changing its batteries to avoid damaging your keys or accidentally following the wrong instructions.
You May Like: Deep Cycle Battery San Diego