DGT environmental labels: what each one means and why it moves prices
ZERO, ECO, C and B: how the badge is assigned, what restrictions it brings and how it shifts used-car resale values.
The DGT's environmental badge ranks vehicles by emissions potential, and city low-emission zones have turned it into a pricing factor: two identical cars with different letters are no longer worth the same.
The four labels
ZERO (blue): pure electrics, hydrogen and plug-ins with enough electric range. ECO (blue-green): most hybrids, gas-powered cars and shorter-range plug-ins. C (green): roughly, petrol from 2006 and diesel from late 2015. B (yellow): roughly, petrol from 2001 and diesel from 2006. Older vehicles get no label.
What it means in practice
Access rules depend on each city ordinance, but the pattern is constant: the better the label, the fewer restrictions today and the less uncertainty tomorrow. An unlabelled car can be shut out of big-city centres.
The mistake of buying on price alone
A cheap B-label diesel can be a great buy in the countryside and a trap in Madrid or Barcelona. The label is geography: the same letter is worth different amounts depending on where you live.
How to check a car's label
By plate on the DGT's website, and it comes in the vehicle report. At Autamo each listing shows the badge alongside the verified data: it is purchase information, not decoration.