Fiat 500 holds the diesel pollution record
A new independent report reveals how harmful emissions from diesel engines have yet to fall, despite increasingly strict European regulations, and promises from manufacturers to follow the rules. Some manufacturers optimise the more modern vehicles in order to pass the type approval test within a given temperature range (20-30°C) on a predefined test protocol, programming the NOx control systems in such a way that they are deactivated when used in actual driving conditions