March 26 (Reuters) - Tesla will give a

one-month trial of its driver-assist technology Full

Self-Driving (FSD) to existing and new customers in the United

States, according to Tesla CEO Elon Musk and the company's

website.

Musk also is requiring Tesla staff to give demonstrations of

FSD to new buyers and owners of serviced vehicles, according to

two emails verified by a Tesla source.

The move comes as Tesla sales and margins are under

pressure because of price competition and softening demand. FSD

is an add-on priced at $12,000, enabling vehicles to navigate

city streets.

Tesla calls its driver-assisting systems Autopilot and

Full Self-Driving, but says the features do not make its

vehicles autonomous and require active driver supervision. Musk

has for years missed his promise of achieving full autonomy, and

Tesla's driver assistant software is under regulatory scrutiny

over safety and marketing.

"All US cars that are capable of FSD will be enabled for a

one month trial this week," Tesla CEO Elon Musk confirmed in a

post on social media platform X on Monday.

The trial has been offered on new sales of Tesla models X,

S, and Y, according to Tesla's website.

Tesla's margins have been hurt by a price war with rivals

that started more than a year ago. In January, Tesla warned of

"notably lower" sales growth this year as it focuses on the

production of its next-generation EV, which is code-named

"Redwood."

The company is also dealing with a rise in regulatory

scrutiny of its self-driving systems and other areas in the

United States and in some European countries. In December, Tesla

recalled nearly all of its 2 million vehicles on U.S. roads to

install new safeguards.