Elon Musk had everyone guessing he was pranking them with the announcement that he was fine-tuning the fart "notes" on his Twitter profile over the weekend.
He wrote: "Tesla (fart emoji) app almost done. Important to get every note right!"
However, it turned out that the new addition to the car's system is real.
Drivers can now choose between a range of trumps from the Ludicrous Fart to Falcon Heavy.
The names of the farts appear to be tongue-in-cheek jokes towards Musk's companies.
Another feature in the update is the fireplace, which allows the screen to turn into a warming background as the temperature is heated up inside the car.