i've tried this below advice, and so far in various combos of turning the key and pushing/turning the buttons all i've managed to do is reset miles, change temp to Fahrenheit, enter the diagnostics mode and finally the settings screen, which doesn't include temp adjustment
mines around 4c too high i reckon, not sure when this happened as it used to be fairly accurate with weather reports and my own temp sensor in the house.
[quote]You can adjust it + and - 3 degrees. Its a similar procedure to resetting the amber maintenance light. Instead of pushing both SELECT and RESET buttons before you turn the key on (to reset the light), turn the key on and then push and hold both bottons. You can then manipulate the temp display plus and minus 3 degrees.[/quote]