charlotteflame1
Key battery low warning on Mercedes V Klasse
Summary of the thread
A 'Key battery low' warning in a 2017 Mercedes V Klasse led to unreliable keyless entry and an error in the system. The most likely cause was a depleted key battery, a common issue even in Mercedes vehicles. Replacing the battery, typically a CR2025 or CR2032, resolved the problem, restoring functionality. If issues persist after replacement, further diagnostics by a technician may be necessary.
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4 comment(s)
charlotteflame1 (community.author)
So, it's really that simple? I thought the key batteries lasted longer. Is it a special kind of battery, or can I just grab one from the store?
nicofire87
While more complex issues can occur, a dead battery is the most probable cause given your symptoms. It is a coin-type battery, CR2025 or CR2032 are commonly used. Consult your owner's manual to verify the correct type. If the issue persists after replacement, it's advisable to seek assistance from a qualified technician for further diagnostics.
charlotteflame1 (community.author)
Thanks for the advice. I replaced the battery, and everything's working fine now. The total cost was 37€ for the battery and some time in the workshop for a quick checkup. I appreciate the help!
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MERCEDES
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VKLASSE
nicofire87
Indeed, it's a common issue, even with Mercedes keys. I've experienced similar problems with my older Mercedes. A 'Key battery low' warning, accompanied by the keyless entry malfunction, almost certainly points to a depleted battery in your electronic key. Before assuming a more complex electronic issue, prioritize a simple battery replacement.