CODE in Flashing Stop Lights project
Depending on what state you are and frequency you set it
In the worst case using the option in DAS to enable central brake light flashing only is perfectly legal anywhere (that is why the option is there)
California vehicle Code 25251.5.
(c) Any stoplamp or supplemental stoplamp required or permitted by
Section 24603 may be equipped so as to flash not more than four
times within the first four seconds after actuation by application of
the brakes.
that is why MB added all the settings including frequency
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