The coolant system is a closed system and all maintenance must be performed by a qualified technician. Contact a workshop1 as soon as possible if you get a warning message saying a service is needed.
Important
Do not open the lid of the coolant tank, and do not top up any fluid. Doing this may result in damage that is not covered by the warranty.
Warning
Coolant must not be swallowed. It can cause damage to the kidneys and other organs. The product contains, among other things, ethylene glycol, inhibitor and water.