Unpair VIN and repair

Hi I bought GLA urban edition 2018 and when I try to pair my vehicle in Mercedes' Me , it says it's already defined to other user. How can I change this? Is diagnostic tool using self serve or visiting nearby dealer to rest is only option?

Hi
I bought GLA urban edition 2018 and when I try to pair my vehicle in Mercedes'
Me , it says it's already defined to other user. How can I change this?
Is diagnostic tool using self serve or visiting nearby dealer to rest is only option?

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