What does it mean when your key battery is low?
low warning light
What the key fob battery low warning light means. When the key is in use, the computer monitors the output voltage of the fob’s battery. Once the voltage gets to a certain point, the warning light will illuminate on the dash to let you know to replace the batteries. Make sure that you use the correct type of battery.
Why does my Mercedes tell me to replace the battery?
This morning however the message was “Key not detected” so I had to start the car using the actual key. Then when I restarted the car after driving about an hour it detected the key and I could start the car with the push button, but the message to replace the battery appeared again.
Why does my new Mercedes key not work?
Went to Mercedes changed battery nothing, ordered new key and again nothing they ordered another I case faulty and still nothing but tried my old key and all of a sudden it works the ignition but not the door locks. I’m confused as my car worked perfectly fine before my son put keys in cuppa tea so why wouldn’t a new key from Mercedes work?
Is there a battery leak in a Mercedes medic?
Check for any leakage if you have older lead acid battery. Absorbed Glass Mat (AGM) batteries are sealed and you don’t need to worry about leakage. AGM type batteries is what newer Mercedes-Benz cars use. Voltage Regulator may be defective and needs replacement. Test the alternator. Make sure it is generating enough amperage.
What kind of battery does a Mercedes Benz use?
You can check price and read reviews for multiple Mercedes-Benz AGM Group 94 Batteries that will fit your Mercedes-Benz. You know you have a relatively new battery. You go to start your Mercedes-Benz and you either hear it turn over once or hear several clicks as in this video. This opens in a new window.
What should I do if my Mercedes key fob is not working?
If you need a replacement battery note that Mercedes-Benz uses CR2025 battery type. Ensure you have new batteries in your key fob. Next, look carefully at your Mercedes-Benz key. When you press the button on your key you should see a small RED led light. The light should light up every time you press any of the buttons (Lock, Unlock, Panic, Trunk).
Why do I get a message when I change the battery in my Mercedes?
If you have old/fake batteries I can see you getting that message all the time. I have a similiar issue, but changing batteries in either key fob doesn’t help, and the car is having trouble sensing either key.
Can a key battery be replaced on a Mercedes?
Sometimes a little luck helps too. Most important is that you resolved your problem and saved big bucks! I bought some El Cheapo batteries from IKEA and went through two of them showing “replace Key battery” — the third one fixed it. Perhaps there is a lot of variability in the batteries.
What kind of battery does a Mercedes Benz FOB use?
If you need a replacement battery note that Mercedes-Benz uses CR2025 battery type. Ensure you have new batteries in your key fob. Next, look carefully at your Mercedes-Benz key.