2017 Merc key missing. Can I....

[phil1979]

.... get the remaining key, AND car, reprogrammed together so that the 'lost' key no longer works on the car?

Thanks for any advice.... Google throws up too many alternatives.

[Krikkit]

Yes, but you'll need the dealer-level STAR system to do it, and even then it might be a main dealer-only job.

All they'll need to do is deauthorise the missing key...

[phil1979]

Thanks - good info!

[Equus]

Ask this guy. He was very helpful when I killed the key to my S-class, and seems to know his stuff.

[phil1979]

Thank you - I will give them a shout.