We are used to accompanying you in the small problems that go with the use of your car. In this article, we are going to take a look at a problem that may seem insignificant but that rather quickly turns out to be annoying if it is not solved. In truth, we are going to help you to know how to replace my Mercedes Classe Cls card battery? The advantage of cards is that they work hands-free, but with no power your card will be useless. That’s why, first, we will see how the card works, then how to replace the battery of the card of your Mercedes Classe Cls?, and, finally, which is the battery that corresponds to the card of your Mercedes Classe Cls.


How does the key card of your Mercedes Classe Cls function?

Before we demonstrate how to replace the batteries in your Mercedes Classe Cls hands-free card, we will quickly illustrate how it works and the benefits it will give you. Who hasn’t had issues locating their car keys in their bag or pocket? For a few years now, car makers have been looking into this issue. With the advent of new wireless solutions, key problems will quickly become a thing of the history! We are going to reveal you the features and operation of your car key card now:

  • It uses a wireless technology that emits a frequency of 433 MHz.
  • Receivers/transmitters are present on the car and on the card so that both can intercommunicate.
  • It permits you to open the Mercedes Classe Cls simply by passing your hand in front of the door or by pulling the handle when the card is close to your car
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  • There are two types of key card, one that permits to open and close like a centralized locking mechanism with the help of a press button, and the other one that allows to open without even touching the card.
  • There is a spare key in the card so that you can open the door and start your Mercedes Classe Cls if you run out of battery power.

How do I replace the card battery of my Mercedes Classe Cls?

We will now move on to the part that interests you the most in this article content, how to replace the key card battery of an Mercedes Classe Cls? Effectively this wireless technology needs energy to function. When the batteries of your card are dead you will not be able to wireless open the doors of your car, but with the help of the integrated physical key you can do it by hand. Relating to the ignition, all you have to do is put the card in the slot provided for this purpose, even without a battery, it has a chip that allows your car to start. We now move on to the procedure for replacing the battery of the card in your Mercedes Classe Cls:

  • Press the button at the bottom and pull out the emergency key at the same time.
  • You will need to see a tab that will allow you to open the case of your card in half.
  • Use a slim thing to remove the used battery from the card
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  • Install the new battery in the slot provided.
  • Close the card.
  • On some models it will work automatically, on others you will have to press the button 4 times to reactivate it.
  • Which category of battery to use for the card of my Mercedes Classe Cls?

    At last, to finish our short post we will help you to select the card battery type of your Mercedes Classe Cls. They all look very identical and it is not always easy to select the right one. It is a button size 3V Lithium CR battery, regarding the number of the battery according to the year of your Mercedes Classe Cls, it can be either the 2016, the 2032 or the 1620.

    If you want more guides on the Mercedes Classe Cls, go to our Mercedes Classe Cls category.