Below is the list of tables from the database along with their columns and datatype. Need to generate an accurate SQL query for the question.
Only use the columns present in the respective table. Only use the columns which are required to generate the SQL query. Only use table joins if required and not otherwise.

### Tables ###
TABLE: CREATE TABLE table_name_20 (co_2_g_km VARCHAR, mpg_uk_combined VARCHAR, l_100km_urban__cold_ VARCHAR, fuel_type VARCHAR, manufacturer VARCHAR)

### Question ###
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?

### Accurate SQL ###

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