2011 Mercedes E-Class Owner's Manual - Page 277

Engine compartment coolant reservoir contains hot fluid and is under pressure. Rusing a rag, slowly turn the cap approximately 1/2 turn to relieve excess pressure. If opened immediately, scalding hot fluid and steam will be blown out under pressure. Rdo not spill antifreeze on hot engine parts. Antifreeze contains ethylene glycol which may burn if it comes into contact with hot engine parts. 275 Windshield washer system/headlamp cleaning system The washer fluid reservoir is used for both the windshield washer system and the headlamp cleaning system. G Warning ! At temperatures below freezing, always fill the washer fluid container with a mix of windshield washer concentrate and antifreeze additive. There is otherwise a risk of damaging the windshield washer system/headlamp cleaning system. ! Only use washer fluid concentrate which is suitable for plastic lenses. Unsuitable washer fluid concentrate could damage the plastic lenses of the headlamps. ! Do not add distilled or de-ionized water to the washer fluid container. Otherwise, the fluid level measuring gauge could be damaged. i Add windshield washer concentrate, e.g. MB SummerFit, to the washer fluid all year round. X Slowly turn cap : half a turn counterclockwise and allow excess pressure to escape. X Turn cap : further counter-clockwise and remove it. If the coolant is at the level of marker bar = in the filler neck when cold, there is enough coolant in coolant expansion tank ;. If the coolant is approximately 0.6 in (1.5 cm) higher when warm, there is enough coolant in coolant expansion tank ;. X If necessary, add coolant which has been tested and approved by Mercedes-Benz. X Replace cap : and turn it clockwise as far as it will go. For further information on coolant, see (Y page 338). Example: washer fluid reservoir Z Maintenance and care Washer solvent/antifreeze is highly flammable. Do not spill washer solvent/ antifreeze on hot engine parts, because it may ignite and burn. You could be seriously burned.