See more from Ask Carzone 
How much to tax a 2009 C-Class?
What motor tax rate for 2009 c class Mercedes 2.1 engine
Our answer:
Hi Cathy,
Tax for a 2009 car relies on its CO2 emissions, but you've not told us specifically which model you mean, so we're going with the C 200 CDI automatic. That emits 171g/km, which means it's in Band E (170-190g/km). That's a €750 fee every 12 months at the time of writing.
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.