If a driver is caught washing their private vehicle on a public street in Spain, how is the financial penalty determined?

A)It is a fixed national traffic fine of €200 and the loss of 3 license points.
B)It is completely legal nationwide as long as the driver uses biodegradable cleaning products.
C)The fine amount is set independently by each local town hall (Ayuntamiento) and can range from €30 up to €3,000 depending on the municipality.Correct

While national law prohibits creating hazards on the road, the specific authority to fine drivers for washing cars on public property is delegated to local municipalities. Because it depends on local city ordinances, fines vary drastically from a minor slap on the wrist (€30) to extreme penalties (€3,000) in strictly regulated urban zones. It never results in a loss of points.