ForumFOB stopped working after the battery was replaced, but how to fix it isSOLVED.
It's always frustrating when your car key doesn't work.There are a number of steps you can take to address this issue.There are some steps you can take to solve the problem of a Mercedes Benz key fob not working.The article addresses issues with unlocked Mercedes Benz models.
You will not be able to open the vehicle's doors or trunk if you don't have a key.It won't allow you to use the fob as a remote.There are many reasons for this issue.
Changing the remote battery is a good first step.Keep reading if you have already done this.
To see what happens when you press the button, look at it carefully.Whenever the lock,unlock, panic, or trunk button is pressed, you should see a red light.There is a problem if you don't see the light.
If the key is working, look for the signal coming from the remote.The signal can be detected using a cell phone.You should be able to see a light when you press a button on the remote if you point your phone at it.If you don't see the light, your key is malfunctioning.
If you take the emergency metal key out of the key, you can use it to manually open the doors.The central locking circuit controls the vacuum operated door locking mechanism which uses pressure to lock all the doors at the same time.A bad antenna module can cause your key to be unable to open doors if you have a Mercedes Benz.Depending on the type of Mercedes Benz you own, the fuse can be found in one of the engine bay boxes, under the dashboard, or in the trunk.Use the Ampere rating recommended by the manufacturer if you find a blown fuse.A higher rating can cause electrical problems.
It is possible that your key needs some work if none of the approaches have worked for you.As soon as the key is in the ignition, you'll be able to sync it with your car.Here is how to change the key yourself.
4.Release the buttons and press the trunk button.This should work with your remote.You can see if it worked by pressing the Lock and Unlock buttons.
You may need to look at the AAM.If you haven't resolved your car's key fob issues by now, this step is a bit more involved and will cost you more money.Good luck.
You can start by reading the AAM fault codes.If you want to do this yourself, you will have to purchase one of the recommended models for Mercedes Benz.If you want to use a diagnostic scanner, you have to turn your car's engine off.When you start the car, you should see codes on the scanner.Follow the procedure in the manual to read them.Unless the module is more advanced, the scanner will not be able to help you.There are different levels of scanning.You can get the same information from more expensive ones.If you enjoy working on your car, these higher end models are a great investment.If the AAM is malfunctioning, you can either buy a new one or reprogram it.If you buy a used one for less money, make sure it has the same last four part number as your model.
It's always frustrating when your Mercedes Benz key can't open the doors.If you read this article, you will be better prepared to deal with this situation.
My key wouldn't start.The key was in and the lock was pressed five times.Is this really magic?David.