How to open a Mercedes key to change the battery. How to change the battery in the Mercedes key fob. Why getting into a car without a key is an extra headache
The key that is used for Mercedes cars, as well as other cars executive class, is currently best guarantee from theft. Compared to an immobilizer, the action of such keys is not limited to a few centimeters around the perimeter of the ignition lock, but this additional convenience for the car owner.
But, like all stand-alone devices, in this vein, it is necessary to periodically replace the battery. Mercedes key battery replacement not difficult, but you need to know some of the nuances of this work.
1. First, locate the battery compartment on your key. It is worth noting that some Mercedes models are not supposed to self-replacement batteries, as a result, these keys do not have a battery compartment. These keys can be bought from a dealer for a very decent amount. But even in these keys, you can change the battery yourself and much cheaper.
2. If your key has a battery compartment, then everything is much easier. Open the lid and take out the battery. Just don't drop the battery as it's small and hard to find later. You need to look at the marking of the battery or take it with you to a specialized store to buy a new one.
3. Now let's talk about how to replace the battery in the Mercedes key if there is no standard battery compartment on the key. See how the two planes of the device are attached and connected. If you find small screws, unscrew them with the appropriate screwdriver.
In the worst case, the key can be fixed using conventional plastic latches, which do not open without damage. Therefore, if you want to open such a key with a knife, remember that then it will need to be glued. Therefore, replacing the battery in a Mercedes key of this type is not initially provided for, but is completely changed by the manufacturer. But our people are not used to overpaying, since the cost of such a key is from 3 to 5 thousand rubles, and the price of a battery is much cheaper.
4. Mercedes - replacing the battery in the key with a new one. Most likely, after installing a new battery, your key will lose contact with the car and stop working. And this means that it must be "registered". Here it should be noted the fact that it will not work to program the key without another working smart.
To reconnect the car with the key, insert another working smart into the lock. Next, turn it to position 2 for 2-3 seconds and return it to its original position again. We take out the key from the lock and press unlock, then the lock button three times. Then we move on to programming the key in which we installed the new battery. We repeat the same procedure with the unlock and lock buttons, as with a workable key.
To finish programming, insert a new activated key, turn on the ignition for a few seconds and turn it off by removing the key from the lock. Now you know how to change the battery in the Mercedes key, as you can see, there is nothing complicated
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Attention
Careless actions can lead to serious consequences, especially if you have only one key: ordering a new key costs from $550 and takes more than a month!
Over time, the key body can be severely damaged, and inadequate amounts are sometimes asked for its replacement. Let's make sure that doing everything yourself is not difficult and much cheaper. To begin with, we order the desired case, for example, on ebay.com (up to $ 15). But remember that the “European” key differs from the “American” one by the presence of a red Panic button and there are different generations FBS3 keys.
Let's get started
We shift the black ribbed latch and pull out the mechanical key.
Sorry, press the gray button.
With a fingernail, we take out the part with the batteries.
Now the most difficult thing: there is a small latch on the white plastic mask, which you need to pry off with something sharp to get the board.
For example, insert the thin part of the battery compartment into the key body as shown in the figures below. Be careful not to damage the board itself!
Then with narrow nippers, carefully, so that nothing is damaged, pull out the board.
If the old case will be thrown away, you can break the body with pliers.
We insert the board into the new case with a finger and assemble everything in the reverse order.
Video of the whole process:
Attention!
If, after replacing the housing, the key stopped working completely or partially (the door opens but does not start), most likely you have damaged the integrity of the board. It must be carefully, under the lens, inspected for damage or open circuits, especially the contacts from the coil and the grip points with tongs, but it is better to ring with a tester. If there is damage, very carefully, avoiding overheating, solder the breaks thin soldering iron.
The key, which is used for Mercedes cars, as well as other luxury cars, is currently the best guarantee against theft. Compared to an immobilizer, the action of such keys is not limited to a few centimeters around the perimeter of the ignition lock, but this is an additional convenience for the car owner.
But, like all stand-alone devices, in this vein, it is necessary to periodically replace the battery. Mercedes key battery replacement not difficult, but you need to know some of the nuances of this work.
1. First, locate the battery compartment on your key. It is worth noting that in some Mercedes models it is not supposed to replace the battery on its own, as a result of which there is no battery compartment on such keys. These keys can be bought from a dealer for a very decent amount. But even in these keys, you can change the battery yourself and much cheaper.
2. If your key has a battery compartment, then everything is much easier. Open the lid and take out the battery. Just don't drop the battery as it's small and hard to find later. You need to look at the marking of the battery or take it with you to a specialized store to buy a new one.
3. Now let's talk about how to replace the battery in the Mercedes key if there is no standard battery compartment on the key. See how the two planes of the device are attached and connected. If you find small screws, unscrew them with the appropriate screwdriver.
In the worst case, the key can be fixed using conventional plastic latches, which do not open without damage. Therefore, if you want to open such a key with a knife, remember that then it will need to be glued. Therefore, replacing the battery in a Mercedes key of this type is not initially provided for, but is completely changed by the manufacturer. But our people are not used to overpaying, since the cost of such a key is from 3 to 5 thousand rubles, and the price of a battery is much cheaper.
4. Mercedes - replacing the battery in the key with a new one. Most likely, after installing a new battery, your key will lose contact with the car and stop working. And this means that it must be "registered". Here it should be noted the fact that it will not work to program the key without another working smart.
To reconnect the car with the key, insert another working smart into the lock. Next, turn it to position 2 for 2-3 seconds and return it to its original position again. We take out the key from the lock and press unlock, then the lock button three times. Then we move on to programming the key in which we installed the new battery. We repeat the same procedure with the unlock and lock buttons, as with a workable key.
To finish programming, insert a new activated key, turn on the ignition for a few seconds and turn it off by removing the key from the lock. Now you know how to change the battery in the Mercedes key, as you can see, there is nothing complicated
During the operation of cars, their owners sometimes have a question about how to change the battery in the Mercedes and Volkswagen keys. They begin to think about this when they begin to annoy the problems of opening the car doors or after the inability to start the engine. Modern cars are equipped with electronic units, which are called immobilizers, and they only work in pairs with the same "smart" key.
How to change the battery in a Mercedes and Volkswagen key we will tell in this article, we hope that it will be useful for owners of other car models, since there are many similarities in these systems. A dead battery creates a lot of problems for owners, so it is advisable to learn how to replace it yourself, especially since you don’t need any special difficulties or the presence of special devices or tools.
Why is she needed?
It has already been said a few words that modern cars are equipped with electronic systems to control important engine systems, and also performs the functions security system. When buying a new car, when the engine is first started, the electronic device is paired with the control unit, communication is carried out between them through the coincidence of the code of both devices.
When for some reason the code does not match the immobilizer cipher, it becomes impossible to enter the car interior and start the engine. There can be many such reasons, one of them may be a “dead” battery. The operating instructions for the car recommend that car owners contact the service centers, but it is quite possible to replace the battery yourself.
A few words about varieties
Every year there are more and more perfect cars, and with them the modernization of the security systems of the machine. Therefore, there are several types of electronic keys. Today there are such options for such products:
- Chip devices;
- Chip keys of a separate type;
- Chips installed in the blades;
- Chip cards;
- Wireless keys with chips.
Separate chipped keys are rightfully considered the oldest products and are no longer produced, but there are still quite a few of them in use. They are two products, this is a key and a keychain to it. To make it possible to start the engine, you need to combine the key fob with a special reader. After the codes match, the systems are unlocked, starting the engine will become possible.
Chips in keys today are the most common products, continue to be produced by many car manufacturers. Most of all they produce folding chip devices. The coding element is installed on the blade of the product, and all the electronics, together with the batteries, are installed in a plastic case. When buying a new car, two keys are issued.
Today, cards with chips have also found their way, as well as keys that connect the owner with the car via radio. Problems with their nutrition will make it impossible for their owners to drive a car.
Replacing a Volkswagen battery
To carry out the replacement, you need to prepare a new lithium battery, and you will also need a small thin slotted screwdriver. On the opposite side of the switches, insert a screwdriver into the place where the halves of the case are connected. The lock available there is carefully moved towards the metal blade. The case is carefully opened and the plastic locks are unlocked on both sides.
After that, you can remove the battery, but be careful, as there may be two of them. Install new batteries, you must strictly observe the polarity. Assemble the case in the reverse order and if everything is done correctly, the indicator light will be visible.
About replacing batteries in Mercedes keys
You need to purchase two batteries CR2025, after which you need to move the latch from its place to remove the blade. After that, with the same blade, you need to press the button gray color, and with a fingernail you need to remove the plate with the batteries.
Carefully look at and remember the polarity of the battery connection, so that you can correctly install a new element.
Assembly is carried out in reverse order. Power change must be carried out as soon as possible, otherwise you will have to program again the electronic unit management.
In a small article it is impossible to explain all the subtleties of such an operation. We tried to convey to you how to change the battery in the Mercedes and Volkswagen keys. Try to carry out this procedure in a timely manner to avoid problems in the future.
Fish bodies are different. The parsing scheme for these keys is almost identical.
Let's start with option number 2 (short fish)
Inside two batteries - CR2025.
We move the latch - in the direction of the arrow and pull out the iron analog key.
Now - with an iron rod or any thin screwdriver, you must press the latch inside and hold it.
While holding the latch, pull out the upper part of the key, which will be easily separated from it.
We take it out of the case. Batteries can be changed and put back in for future use.
Now (if necessary) in order to pull out the microcircuit, you need to pull or hook the white wide overlay with anything and pull. Best done with tongs.
Carefully- the white pad can pop out and fly away.
All details.
Option number - 3 (chrome fish)
There are two options for chrome keys - with and without a top cover.In order to open this cover, we take out the iron pen of the key.
We start the end of the key in the groove in which the latch of the cover. We click on it.
The lid will open by itself without effort (bounce).
Under it we see the battery that needs to be changed. The battery is one.
Version without lid it is necessary to pull out the insides in which the batteries are located.
We take out the iron part.
By pressing the latch - at the same time pull it out of the case, will go hard.
Turn over and see - 2 batteries that can be changed.
Put everything back together and you can use it. Ready.
Option - 1 (long fish)
For this option, we do everything by analogy with the small key (2).
Components.
This guide was used: 8910 once.
Thanks to technical progress many everyday things are becoming more and more convenient. However, sometimes technical innovations have the opposite effect. For example, in cases where your Mercedes electronic key stops working due to the fact that the batteries are dead in it. But do not panic, this problem can be easily and quickly solved on your own. If you do not know how to change the battery in a Mercedes key, this article is for you. All you need is a couple of CR-2025 coin cell batteries and a little sleight of hand.
How to open a Mercedes key?
The batteries are in the body of the electronic key fob, so the first thing to understand is how to disassemble the Mercedes key. Type of electronic car key brand Mercedes popularly called "fish" because of its shape. On the side of the "head" of this fish there is a built-in mechanical key, which is incredibly useful in this situation. Firstly, he will help you open the lock of the car and get spare batteries from there (and you must have them, otherwise you simply won’t be able to leave in such a situation). Secondly, with its help, we will disassemble the remote control case.
- Move the fuse to the opposite side and remove the metal key from the body of the fish.
- Insert the long side of the wrench into the hole on the body and slide it. You will feel the mechanism of the button, you need to press it.
- When the button is pressed, the battery cover will open.
You disassembled the electronic key and saw old CR-2025 batteries. There may be one or two, depending on which model your Mercedes keychain is. The next step is to replace the battery in the Mercedes key.
- Take out the batteries and replace them with new ones, observing the poles of the batteries.
Done, now you can start the car without problems and keep driving it until the next battery drain on your key. But thanks to this simple guide, you now know how to change the battery in your Mercedes key, and this problem is no longer a problem for you. Most importantly, do not forget to carry a spare set of batteries with you.
Are you unable to open or close your car? Can't start the engine? Is your Mercedes key fob not responding to your actions? The most common reason why the key fob does not respond to button presses is a dead battery in the remote control. Do not know how to change the battery in the remote control? We invite you to watch a video with which you can learn how to own Mercedes-Benz cars.
Here is a detailed video clip with which you can find out how the battery changes in four types:
Depending on the type of remote control used, the required number of batteries varies. So the first key (Type 1 - triangular panic button) uses only one CR 2025 battery.
The second key (Type 2 - round panic button) has two CR 2025 batteries.
The third key fob (Type 3) also has two CR 2025 batteries.
The fourth key, which is also easy to replace the battery yourself, also has two 2025CR batteries.
Please note that for a long life of the CR 2025 battery and other similar batteries, purchase only lithium batteries, which have a long service life. Attention!!! There is a wide range of coin cell batteries on the market today.
Unfortunately, most cheap batteries don't last long due to poor quality batteries that don't hold a charge.
Therefore, when choosing a battery for the car remote control, choose only expensive items food, famous brands.
How to change the battery in your keychain | Mercedes
Replacing the battery in a Mercedes car key.
Can't open or close own car? Can't start the engine? Your key Key fob Mercedes does not respond to your actions? A common reason that the key fob does not respond to button presses is the reduction battery in the console. I do not understand how change Is there a battery in the remote remote control? We suggest you watch the video to help you learn how to change car battery keychain Mercedes-Benz
Here is a detailed video to help you see how they change. battery in 4 types of car keys Mercedes:
Depending on the type of remote control you are using, the required number of batteries varies. So first key(Triangular panic button type) only uses one CR 2025 battery.
second key(Type 2. Round panic button) has two CR 2025 batteries.
Third keychain key(Type 3) also has two CR 2025 batteries.
fourth key, which is also easy to replace, also has two 2025CR batteries.
Please note that for the long life of CR 2025 and similar batteries, buy only long life lithium batteries. I like to change battery history in mercedes key how to change battery. Warning. A wide range of "tablet" batteries is currently available on the market.
Unfortunately, most cheap batteries cannot last long due to the poor quality of the non-rechargeable battery.
Therefore, when choosing car battery for remote control, choose only expensive batteries of well-known brands.
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