Hi, New to this, so be gentle. Have an Avensis 2012 estate and just got a warning light come up on the dash. Not sure what it is for as the manual states no such light in the book. Have asked about and got it needs to go on a diagnostic machine. They stated it was a hill descent warning light, and it had failed. Having never used the electronic brake to that extent, I am unsure what this means. Old school Land Rover type here, only ever driven things with braking by wire. Had this