The engine cooling system is designed maintenance free for normal operation until the change interval of the coolant is reached when the corrosion inhibitors have been used up.
in the course of servicing, the coolant level is checked at certain vehicle-specific intervals for safety-related reasons. if it is found in this process that the coolant level is too low, the engine cooling system must be checked for proper condition and fluid loss, and the coolant must be checked for the correct anti-corrosion agent/antifreeze content in accordance with the vehicle-specific specifications. this also applies if the coolant warning lamp should light up in the vehicle during operation. any problems that were identified must be rectified to ensure the safe operation of the engine cooling system.
available for 1.5 liter and 1liter.