See more from Ask Carzone 
How much to tax a 2013 C-Class?
How much to tax a Mercedes c class 2013
Our answer:
Hi Aine,
It depends on the car's official CO2 rating. That varies considerably across the range depending on the model and engine. A C 200 CDI, for example, could emit 135g/km, which would cost €210 per year to tax.
Have a motoring question? Ask us here!
Ask us anything motoring related and please provide as much information as possible so we can give you the most accurate advice.