2010 Mercedes ML-Class Owner's Manual - Page 364

362 Fuels, coolants, lubricants, etc. vapors may escape when opening the AdBlue® tank. Coolants The engine coolant is a mixture of water and anticorrosion/antifreeze, which provides: RCorrosion RFreeze G Warning! When opening the filler cap of the AdBlue® tank ammonia gas vapors may escape. Refill AdBlue® in a well ventilated area only. Ammonia gas vapors have a pungent odor and are particularly irritating for your skin, mucous membranes, and eyes. Inhaling ammonia gas vapors will cause burning eyes, nose, and throat, as well as coughing and watering eyes. protection protection RBoiling protection (by increasing the boiling point) The cooling system was filled at the factory with a coolant providing freeze protection to approximately -35‡ (-37†) and corrosion protection. Low ambient temperatures AdBlue® freezes at a temperature of approximately 12‡ (-11†). Your vehicle is factory equipped with an AdBlue® preheating system. The vehicle can thus be operated at temperatures below 12‡ (-11†). Special additives ! Only use AdBlue® complying with ISO 22241. Do not add additives to AdBlue® and do not dilute AdBlue® with water. Otherwise, the BlueTEC exhaust gas aftertreatment system could be damaged. Damage caused by using additives or diluting with water are not covered by the Mercedes-Benz Limited Warranty. Purity The purity of AdBlue® is of particular importance for avoiding malfunctions in the exhaust gas aftertreatment. If AdBlue® is pumped out of the tank, e.g. during repair work, the same liquid must not be used to refill the tank as its purity is no longer guaranteed. ! Impurities caused for example by other service products, cleaning agents, and dust result in increased emissions, malfunctions, catalyst damage, or engine damage. ! Add premixed coolant solution only. Adding water and MB 325.0 Anticorrosion/ Antifreeze separately from each other, could cause engine damage not covered by the Mercedes-Benz Limited Warranty. If the antifreeze mixture is effective to -35‡ (-37†), the boiling point of the coolant in the pressurized cooling system is reached at approximately 266‡ (130†). The coolant solution must be used year round to provide the necessary corrosion protection and increase boil-over protection. Refer to the Maintenance Booklet for replacement interval. Coolant system design and coolant used determine the replacement interval. The replacement interval published in the Maintenance Booklet is only applicable if MB 325.0 Anticorrosion/Antifreeze solution or other Mercedes-Benz approved products of equal specification are used to renew the coolant concentration or bring it back up to the proper level. For information on other Mercedes-Benz approved products of equal specification, contact an authorized Mercedes-Benz Center or visit www.mbusa.com (USA only). To provide important corrosion protection, the solution must be at least 50% anticorrosion/antifreeze (equivalent to freeze protection to approximately -35‡ [-37†]). Technical data