166 Service and maintenanceDiesel fuel filterO n the event of eng ine oil change, havefuel filter checked for possible waterresidue by a workshop.Illumination of A indicates wa ter in thefuel filter 3.Hav e fuel filter checked at shorter intervalsif the v ehicle is subjected to extrem eopera ting conditions such as hig h humidity(primarily in coastal areas), extrem ely highor low outside temperatures a ndsub stantially v arying day tim e a ndnight-tim e temperatures.Coo lantThe coola nt provides antifreeze p rotectiondown to approx. -28 °C ..Anti freeze a nd corrosion prot ect ionHav e the concentration of the radiatorcontents tested by a workshop beforewinter starts. The amount of a ntifreezemust provide protection down to app rox .-28 °C. A lower a ntifreeze concentrationwill reduce the amount of protection fromfrost and corrosion. Add antifreeze ifnec essary .If c oolant loss is topped up with wa ter,have concentration check ed a nd addantifreeze if necessary.Ca utionOnly use approved antifreeze.Coolant additives for ad ditionalcorrosion protection and sealing smallleaks can c ause operation problem s. N olia bility is accepted for da mage causedby using coolant additives.9 WarningAntifreeze is a danger to hea lth; it musttherefore be k ept in the orig inalcontainer and out of the reach ofchildren.Ofrecido por www.electromanuales.com