The Renault Express is up to #10 in Bulgaria in September. The Bulgarian new car market drops -12.1% year-on-year in September to 1.932 registrations, leading to a year-to-date tally up 18.6% to 24.008 units. Dacia (-4.5%) and Renault (-22.3%) end the month equal #1 in the brands ranking with 12.1%…