What Does 'Top Up Coolant' Message Mean On Mercedes?

Inotherwords,adeclining coolantleveliswhat triggersamessagelikethis.

Belowareafewreasons whyyourcoolantlevel ofacarmightdecline;

Reason Why a Mercedes Might Leak Coolant

A bad radiator

Aradiatorisa devicethat radiatesheat.

Thisisthepartthatmakes itpossibleforthecoolant todisperseengineheat.

Asaresultofwhich,the"Topup coolant:SeeOwner'sManual" messagemayappear.

A faulty water pump

Thewaterpump,asmostof youprobablyknow,isa devicethatpumpscoolant.

And,guesswhat…ifitgoes bad,yourcarwilllosecoolant.

Adropincoolantlevelduetoabad waterpumpcanactivatethe"Topup coolant:

A cracked head gasket

Anenginehasmanyseals andgaskets-thehead gasketbeingthemajorone.

And,yes…itmayprompt thecomputertodisplay the"Topupcoolant:See Owner’sManual"message.

A bad thermostat

Inanutshell,thethermostat isakindofvalve.

Itessentiallycontrolscoolantflow betweentheengineandtheradiator.

Flawswithsuchacrucial componentcanresultin coolantloss.

And,yes,youwouldbe righttoguessthat coolantlossduetoa badthermostatcan;