The Smart media system (Renault R-Link, TomTom) isn't the most reliable stereo.
It looks to be powered by Android so it's no wonder it crashes and freezes up every so often.



Apps crash and freeze, the touch screen stops working, music won't play, no sound. Take your pick.

Turning the stereo off and on again rarely helps, especially when it's frozen and ignoring button presses.

Sometimes, even turning the ignition off and on again doesn't fix the issue.
Not to mention that turning the car off can be awkward and dangerous as you drive.

Something goes tits up in the system and it's not forgetting the problem any time soon.

The fix is pretty easy. The manufacturers were good enough to put in a hardware/software reset.

All you have to do is press the home button 5 times. (it's the one with the house symbol).
The stereo will reboot and hopefully the issue will be gone until the next time something goes wrong.