Originally Posted by pritch21
The dash is showing a yellow square. I think it's the break fluid, but I'm not sure what needs to be done - Whether it the car needs some more brake fluid or whether I need to flush the system completely.
First you're best to verify exactly what is service item is being flagged up via the idrive or OBC...
If it is brake fluid (fixed service item every 2 years) then it needs a full flush and new fluid, 2 litres will be enough to flush properly and refill.
Is your car 2, 4 or 6 years old?