If your car is an import, it is limited to 112mph (180kph). Go on eBay they do little de-limiters for imports for about £30. This changes your speedo reading to MPH so you might need a new face (www.importsolutions.co.uk). They are easy to fit but require some wiring, an auto electrician would be a good idea.UK cars should not be limited, however if it is then the ECU will require a re-chip.