Method for identifying and authenticating a user profile for the use of services onboard a motor vehicle

The invention relates to a method for identifying and authenticating a user profile, allowing the use of services connected to a multimedia system on-board a motor vehicle (2), the multimedia system comprising a memory (221) comprising a user profile for a portable device (5), the vehicle comprising a first device for communicating with a remote server (3), the remote server comprising a memory (222) and a second system for communicating with the portable device, the portable device (5) comprising a memory, the method comprising a step of detecting the presence of a portable device (5), if a portable device (5) is detected, the method comprises a step of receiving authentication information of the user, a step of transmitting the authentication information to the remote server, a step of verifying the authentication information, and a step of the multimedia system receiving a confirmation of the use of the user profile if the authentication information is compliant.