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DTS Monaco : How do I unlock unit using a seedkey?

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Old Aug 17, 2025 | 12:28 AM
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Benzo_Kimura's Avatar
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DTS Monaco : How do I unlock unit using a seedkey?

Hi there.

I have a Japanese spec 2019 CLS450 4matic.

Tried to code ECU(MGR1) with DTS monaco. but I can't unlock security access with seedkey.

I followed the steps in the YouTube video linked below and entered the 4-digit hex code displayed by calculating the seed key provided by the vehicle into the seed calculator, but it still doesn't unlock.

What am I doing wrong? Or is it because it's a newer generation vehicle that I can't unlock it?


link : https://youtu.be/ZC5VD127QyA?si=F8rL-FlIhWULGGrA
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Old Aug 19, 2025 | 10:16 AM
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dagger22's Avatar
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2019 CLS450 (C257)
your car model should be okay to unlock. Which seed key program are you using, and what error are you getting?
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