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2015 GLA 45 AMG Spare Key

Posted: Mon Nov 10, 2025 9:53 am
by rpaoness
Car only came with one key. I think 2017 was a breakpoint for Benz key coding and that's why I was stuck with dealer-only for the GLS550. Since the GLA is a 2015, I'm thinking either BenzNinja or some other locksmith/coding crew can help me out.

Should I buy an OEM used key off Ebay? I couldn't seem to find a key on the mbparts lookup.

Existing key seems to have the PN on it: 204y51000100

Some people seem to go by the FCC ID: IYZDC11, not sure if that means all IYZDC11 will be compatible.

Here's an example for $20.

https://www.ebay.com/itm/356246382194?_ ... BMyvn6481m

Re: 2015 GLA 45 AMG Spare Key

Posted: Mon Nov 10, 2025 10:32 am
by kevm14
Benz Ninja won't touch keys.

And as for the rest, I don't know any of those answers. It is possible there could be some more DIY friendly less-than-dealer-retail-cost for a key, but I'd have to look into it.