Your Mercedes Classe B doesn’t start anymore? Have you tested everything? Battery, alternator, spare keys… And you feel like the problem emanates from your immobiliser ? It is reasonably plausible, indeed that it is in question if your car doesn’t want to start anymore or stalls when starting for no reason. You want to disable the immobiliser on your Mercedes Classe B ? You are on the good article, we have made this content to help you see more clearly and fix your problems relating to this component. First, we will see how the immobiliser functions on your Mercedes Classe B, then the different ways to disable it.

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How your immobiliser system functions on Mercedes Classe B

Before detailing the different solutions available to you, here is a short introduction to demonstrate the aim and functions of the immobilizer in your Mercedes Classe B. This electronic element appeared 30 years ago and aims to prevent the theft of your Mercedes Classe B. Indeed, thanks to a transponder and an antenna (coil) integrated in the key, and, a immobilisation control box integrated in the ECU and a reception antenna on the neiman, your Mercedes Classe B will go each time you place the key in the ignition, it checks that the code emitted by your key is indeed the one expected by your immobilization box. It is only at this moment, that it will permit you to start. It is thanks to RFID technology (chip in the key) that this device will work.

The different solutions to bypass the immobiliser on your Mercedes Classe B

Enter the code to turn off the immobiliser

First process, your key no longer allows your Mercedes Classe B to start, you want to disable the immobiliser of your Mercedes Classe B, but first of all you should try this technique to start it and take it to a mechanic verify that you can not do a less significant operation to bring back the normal start of your vehicle. Indeed, with your vehicle you should have a spare key (which you should try and which should start your Mercedes Classe B), but if you don’t have it you should at least have the “code card”, it includes the start code. Thanks to this code, you will still be able to start your vehicle by entering it manually. To do this, turn on the ignition, use your centralized button to enter the digits, several quick presses (example: 2 for digit 2) then a stop of one and a half seconds to confirm the digit and resume, duplicate the operation until you have entered the full code. This should enable you to start your Mercedes Classe B without having to remove the immobiliser.

Fix your key at a key specialist or your car dealership

If despite a battery change, several tries to enter the immobiliser code on your Mercedes Classe B still doesn’t want to start, it’s probably your key that’s at issue. We can understand that you still want to bypass the immobiliser device from your Mercedes Classe B. Indeed, your transponder must have been weakened or must have fallen off your key. To fix this problem, only solution, go to a key specialist (also available on the internet) or, at your dealer who can repair your Mercedes Classe B key. Based on who you go to the repair should cost you about 100 euros if you still have a copy or your “code card” and about 350 euros at your dealer if you have no support and you want a new functional key, it will avoid you having to remove the immobilizer from your Mercedes Classe B.

Manually remove your immobilizer

Although you may be thinking to bypass the immobilizer from your Mercedes Classe B, this is not recommended at all for different reasons. First your Mercedes Classe B would be much more vulnerable to theft attempts. Indeed, without an immobiliser box, simply doing “the wires” may be enough to start it. Additionally to that, your insurance, in case of theft most likely won’t refund you if it knows that the immobiliser on your Mercedes Classe B has been removed, bypassed or deactivated. This if you still want to do it, some sites still give the process, we have made the choice not to disclose it, because it could help people with bad intentions.

To get more tips on the Mercedes Classe B, take a look at the Mercedes Classe B category.