Loaded my iPhone 13 contacts into my Mercedes GLA, names have not synced

Unlike some Android devices, contacts are neither stored locally on an iPhone nor in SIM. They are synced to an email account that you had Google, iCloud, AOL, Exchange, Outlook, Yahoo or any Other

If Contacts were on iCloud, try this --> Restore contacts, calendars, bookmarks, and more using ...

Else Add the email account that stores your contacts in the IOS mail app and enable Contacts. If you have a corporate email account added through a profile on your device, please check with your organisation's system administrator.

This may also help you --> Adding phone contacts to Mercedes-Benz

This forum may have a better answer --> iPhone contacts not sync'd - MBWorld.org Forums