[Fixed] Need key code to program spare for 2017 Mercedes Benz B Class

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Need the key code to program a replacement key for my 2017 Mercedes Benz B Class

Hello! We've developed a VIN-based tool to help you get your key code for the 2017 Mercedes Benz B Class. Check it out here: VIN Key Code Generator.

Replies (6)

I think my 2017 Mercedes Benz B Class has the same issue. Good to know I'm not alone.

My mechanic said this might help with my 2017 Mercedes Benz B Class key issue.

Finally, something that might help with my 2017 Mercedes Benz B Class's key code issue!

My 2017 Mercedes Benz B Class just blinks. I think this might fix it.

This forum is more helpful than my dealer. Thanks from a 2017 Mercedes Benz B Class owner.

Was about to give up on my 2017 Mercedes Benz B Class, but this gives me hope.

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Key Programming
Programming syncs the key's transponder chip with your car's immobilizer system. The process varies by manufacturer but generally involves: 1) authenticating with the car's computer 2) erasing old keys if needed 3) programming new key codes 4) testing functionality.
Key Tip: Avoid exposing key fobs to water or extreme temperatures
Lost Keys
Yes, a skilled auto locksmith can extract the broken key and make a replacement. They can often do this without damaging the ignition cylinder. The new key will need programming if it has a transponder chip.
Key Tip: Store your key code separately from your keys
Key Programming
Most transponder keys and smart keys can be reprogrammed if they haven't been damaged. Basic mechanical-only keys (no chip) can't be reprogrammed - they must be physically cut to match your locks.
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Not recommended. Bypassing requires specialized knowledge and may violate anti-theft laws. Proper solutions: 1) Get correctly programmed keys 2) Replace faulty immobilizer components 3) Have dealer reset the system if keys are lost.
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This typically indicates: weak fob battery (replace first), damaged fob antenna, or issues with your car's receiver (often in the door handle or rearview mirror). Environmental interference from other electronics can also reduce range.
Key Fact: The average driver will lose 1-2 car keys during ownership

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