Interesting fault on my 2014 Brooklands Roadster. After a short stop , on engine start discovered a not previously seen light flashing on the dashboard accompanied by an audible warning ( beeping ) . Eventually worked out that it was a seat belt warning . But yes, you are right these cars don't have this refinement fitted. Eventually after reading the handbook , scratching of head and going through engine start a number of times the warning disappeared, as yet not to return. . MMC have said not seen this before, nor has Revolutions, the dealer in Perth. Has anybody else experienced this phantom warning? The ECU!s in these cars I think it's fair to say have been known to have the odd glitch, but to get a warning for something not actually fitted is a tad bizarre .