Mercedes-Benz S-Class Owner's Manual page 595

Display messages Possible causes/consequences and
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* The stationary heater is temporarily malfunctioning.
inoperative See Owner's
Man.
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* There is too little fuel in the fuel tank. The stationary heater cannot be switched on.
inoperative Refuel vehicle
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* The on-board electrical system voltage is too low.
inoperative Battery low
Open the window to ensure that there is a sufficient supply of fresh air.
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Open the window to ensure that there is an adequate supply of fresh air.
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Consult a qualified specialist workshop immediately.
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When the vehicle is on a level surface and the engine has cooled down, make up to four attempts to switch on
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the stationary heater, waiting several minutes between each attempt.
If the stationary heater does not switch on, consult a qualified specialist workshop.
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Refuel the vehicle.
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The stationary heater has switched itself off.
Drive for an extended period until the battery has reached a sufficient charge level again.
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Display messages and warning/indicator lamps 593
M M Solutions