The correct values ​​for Bulgaria are:

Spoiler: BUL info

[BUL]
flag_phase=6
flag_icon=countryflag_bul
in_city="50"
out_of_city="90"
expressway="120"
motorway="140"
given_in_miles="-"
vest="+"
exting="+"
light="+"
towrope="-"
sparebulb="-"
warning_triangle="+"
first_aid_kit="+"
motorcycle_helmet="+"
winter_tyres="R"
snow_chains="M"
according_to_adac="-"
alcohol="0.5"
international_dial_out_prefix="00"
phone_country_code="+359"
emergency_number="112"
currency="EUR"
license_plate_country_code="BG"
speedlimits_1="Coach|0x8|0x3ff|50|90|100|100"
speedlimits_2="Truck|0x2|0x207|50|90|90|90"
speedlimits_3="Trailer|0x2|0x1f8|50|80|80|80"