Well, I've found the solution: The Vanishing Game. (Not an actual game, it's just the title.) It's an online story written by William Boyd, sponsored by Land Rover. It follows the accidental adventure of unemployed actor, Alec Dunbar and KT-99, a worn-in Land Rover Defender, from London all the way to the very north of Scotland on a dangerous, unpredictable mission. Even though it's sponsored by Land Rover, the promotion is minimal and subliminal. Alec Dunbar is clearly the star of the story, not KT-99. But it does clearly set the Land Rover lifestyle: adventurous, intelligent, and rugged.
The Vanishing Game, by William Boyd
Between the rich language and calming, yet real, voice, the background noises, images, and movement of the words, it completely encompasses you in the story.The plot is engaging and you'll be hooked after the first part (there are 6 in total), but I don't want to give too much away. I'll just say that it takes many turns and will have you guessing what's next as much as you do when you read an adventure novel. If there was a full book form, I would be the first one in line to buy it.