Mobile device tethering for a remote parking assist system of a vehicle

A vehicle comprising:

• a proximity sensor;
• and
• a processor;
• and
• a memory storing computer-executable instructions, that when executed by the processor, cause the processor to:
• provide an instruction to a mobile device to bring the mobile device within a provided range of the proximity sensor;
• determine that the mobile device is within the provided range of the proximity sensor;
• determine, based on the determination that the mobile device is within the provided range of the proximity sensor, an initial location of the mobile device relative to the vehicle;
• periodically determine the location of the mobile device relative to the vehicle, based on the initial location of the mobile device and dead reckoning on the mobile device;
• determine, based on the location of the mobile device relative to the vehicle, that the mobile device is within a threshold distance of the vehicle;
• and
• enable, based on the determination that the mobile device is within a threshold distance of the vehicle, an autonomous parking operation.