CALIFORNIA (BLOOMBERG) - Tesla was accused by a regulator of disseminating false statements about its vehicles' "Autopilot" and "Full Self-Driving" features, leading customers to believe they are more advanced than they are.

The California Department of Motor Vehicles (DMV) said the company violated the law when it "disseminated statements that are untrue or misleading".

The complaints, made in letters to the state Office of Administrative Hearings on July 28, were first publicised in a Los Angeles Times report Friday (Aug 5).

Autopilot and the promise of fully self-driving vehicles are a big part of the Austin, Texas-based company's lofty valuation. But regulators have raised questions about the capabilities of those features.

The National Highway Traffic Safety Administration (NHTSA) is probing several Tesla crashes that involved Autopilot, including those where Tesla cars slammed into parked first-responder vehicles.

The DMV is asking the company to provide more accurate terms and better descriptions to inform customers. If it prevails in a hearing against Tesla, and the carmaker fails to comply with the terms, the agency can refile its complaint and seek harsher penalties, according to a DMV representative.

The California DMV's recent complaints are separate from the agency's ongoing review of the intended design and technological capabilities of Tesla vehicles.

The electric carmaker is a major employer in California, with more than 45,000 workers. Its factory near San Francisco, in Fremont, California, produces the Model S, X, 3 and Y.

At Tesla's shareholder meeting Thursday (Aug 4), chief executive Elon Musk said FSD Beta, a version of software that has been rolled out to over 100,000 Tesla customers, is continuing to rack up millions of miles.

"We're now at over 40 million miles," said Mr Musk.