CREATE TABLE table_name_20 (co_2_g_km VARCHAR, mpg_uk_combined VARCHAR, l_100km_urban__cold_ VARCHAR, fuel_type VARCHAR, manufacturer VARCHAR)
What's the CO2 g/km of a Fiat running on diesel with the L/100km urban more than 6.3 and an mpg-UK combined of 43.5?
SELECT COUNT(co_2_g_km) FROM table_name_20 WHERE fuel_type = "diesel" AND manufacturer = "fiat" AND l_100km_urban__cold_ > 6.3 AND mpg_uk_combined = 43.5