Tesla CEO was attacked for the peculiar update to his cars, as social media users were quick to tell him about fixing problems with the cars. While others asked for "jungle and rain forest sounds". Car horn regulations in America are reasonably flexible as long as the horn is audible from 200 feet away and cannot be "an unreasonably loud or loud sound or a whistle."
But the idea could not be introduced to Teslas in Europe when the EU decided that an electric car's false noise "should sound like the sound of a vehicle in the same category equipped with an internal combustion engine."
Mr Musk wrote on Twitter: "Custom horns and movement sounds (coconuts are, of course, one to come to Tesla soon."
He later tweeted emoji from a goat and whoopee pillow.
His mention of coconut sounds looks appears to be a direct reference to Monty Python and Holy Holy, one of the CEO's favorite comedy films.
READ MORE: Elon Musk: The SpaceX founder reveals the cosmos's dominance
Mr Musk's latest idea comes after NASA chief Jim Bridenstine made a thinly veiled shot at Elon Musk over the SpaceX commander's inability to meet his deadline to the US Space Agency.
Back in 201
SpaceX, which was awarded the contract with Boeing, was supposed to rage ISS crew now, but several delays, including an explosion during a ground test of Dragon Crew capsule back in July, have put SpaceX back.
As a result, NASA has continued to rely on Russia's Soyuz rocket to take US astronauts to the ISS.
The South African-born billionaire told CNN: "Everything in aviation is eight years behind.
" Most of the work required from now on by NASA astronauts is a long line of safety reviews, so it's not really hardware related, and it really goes as fast as we can.
"If there is any way to make it go faster, I would, it goes faster."
Mr Musk added that the Commercial Crew could begin delivering astronauts to the ISS within three to four months.
The war of words calmed down, with Mr Bridenstine tweeting that he had a "great phone conversation with Elon Musk this week, and I look forward to visiting SpaceX in Hawthorne, California next Thursday."