Mercedes-Benz Group AG has a shareholder problem that has nothing to do with sales figures or software glitches. Two of its largest investors are Chinese, their combined stake sits just under 20 percent, and the U.S. Senate is now advancing legislation that treats anything above 15 percent Chinese ownership in a vehicle manufacturer as a national security threat. On July 22, 2026, the Senate Commerce, Science, and Transportation Committee marked up the Connected Vehicle Security Act of 2026 and passed it out of committee with unanimous, bipartisan support, sending it to the full Senate floor.
S.4429 isn’t a new bill. Sen. Bernie Moreno (R-Ohio) and Sen. Elissa Slotkin (D-Michigan) introduced it back in April, and Rep. John Moolenaar (R-Michigan) filed a companion version in the House a couple weeks later with 43 cosponsors of his own. We broke down what this bill actually targets when it was still working toward its first committee vote; the short version is that it bans connected vehicles, their software, and their onboard hardware tied to a list of covered countries that includes China, Russia, Iran, and North Korea.
Read past the ban on Chinese cars headline, though, and the bill does something more specific than most coverage has mentioned. Section 4 doesn’t only prohibit vehicles physically built inside those four countries. It also prohibits any connected vehicle built by a manufacturer in which more than 15 percent of the equity, voting power, board representation, or other control is held by an entity based in a covered country, effective January 1, 2027. Software gets a 25 percent ownership ceiling on that same date, and the physical connectivity hardware, the telematics units, cellular modems, and control modules that give a car its always-on link to the outside world, gets that same 25 percent ceiling but three extra years, until 2030, to comply.
That 15 percent line for finished vehicles is the one that should worry Stuttgart. Mercedes-Benz Group’s own investor relations page lists the Chinese state-owned BAIC Group as holding 9.98 percent of the company’s voting rights, making it Mercedes’ single largest shareholder. Li Shufu, the billionaire chairman of Zhejiang Geely Holding Group, personally holds another 9.69 percent through an investment vehicle called Tenaciou3 Prospect Investment Limited. Add the two positions together and the combined Chinese stake comes to roughly 19.67 percent, comfortably above the vehicle threshold and within range of the higher ceiling that applies to software and hardware.
The bill’s language covers indirect control, not just a direct stake in the badge on the trunk lid, and that distinction matters because Mercedes doesn’t only import cars into the U.S., it builds them here. Mercedes-Benz U.S. International in Tuscaloosa, Alabama, has been the company’s home for SUV production since the plant became Mercedes’ first major manufacturing site outside Germany, and it recently assembled its five-millionth vehicle on that same line. MBUSI is a wholly owned subsidiary of Mercedes-Benz Group AG, so the parent company’s shareholder registry is exactly the kind of upstream ownership this bill is written to catch, regardless of which state actually welds the sheet metal.
There’s a wrinkle here that’s easy to miss if you only skim the ownership percentages. Li Shufu isn’t a passive Mercedes shareholder collecting a dividend check; his holding company also owns Volvo Cars outright and controls Polestar, which means the same executive holds a position on the cap table of a German luxury brand still committed to keeping big V12 engines alive for American buyers, and a Swedish brand that already builds cars in South Carolina. Lawmakers have spent most of this debate talking about upstart brands like BYD elbowing into global markets, but the ownership math in this bill sweeps up legacy European manufacturers that nobody was picturing when Congress started drafting it.
The bill isn’t a guillotine with no lever to stop it before it drops. Section 4 lets the Commerce Secretary, acting through the Under Secretary for Industry and Security, issue authorizations exempting specific companies or products if a written risk assessment concludes they don’t pose a data-exfiltration or national-security risk, following a 60-day notice to Congress. Nothing stops the Senate from amending the ownership threshold itself before a final floor vote, either; that’s the entire point of markups happening before passage rather than after. Guessing wrong once the law takes effect isn’t cheap: the bill sets civil penalties at a floor of $1.5 million or five times the value of the transaction, whichever is larger, with every additional day of a continuing violation counted separately.
None of this touches a single Mercedes currently sitting on a dealer lot or already registered to an American owner. The prohibitions are forward-looking, tied to vehicles imported, manufactured, or sold after January 1, 2027, and the bill includes no language clawing back cars already on the road. What it does add is a new item to automakers’ compliance checklists, one that has nothing to do with crash ratings or emissions and everything to do with who owns stock in the parent company. It’s one more variable layered onto an industry already juggling a moving target of parts and assembly tariffs that has automakers rethinking where vehicles and components get built in the first place.
The bill’s next stop is the Senate floor, where a vote could come within weeks given today’s unanimous committee support. The House companion bill is still spread across three separate committees, so a signed law isn’t imminent. But when a Republican from Ohio, a Democrat from Michigan, and dozens of cosponsors from both parties keep pushing the same legislation forward in a Congress that agrees on almost nothing else, betting against some version of it eventually becoming law looks like the riskier bet. Whether the ownership number that matters to Mercedes stays at 15 percent, climbs to 25 percent, or gets swapped for a case-by-case security review is the detail worth tracking over the next few months, not the ban on Chinese cars shorthand everyone keeps repeating.
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