2011 Mercedes GLK-Class Owner's Manual - Page 299

Service products and capacities Rmisfire Rpower 297 loss In areas where carbon deposits may be encountered due to lack of availability of gasoline which contains these additives, Mercedes-Benz recommends the use of additives approved for use in Mercedes-Benz vehicles. Consult an authorized Mercedes-Benz Center or visit http://www.mbusa.com (USA only) to view a list of approved products. Observe the instructions for use on the product label. Do not mix other fuel additives with fuel. This causes unnecessary costs and could damage the engine. exhaust gas aftertreatment; this is not covered by the Mercedes-Benz Limited Warranty. Follow the instructions in the service interval display regarding the oil change. Otherwise, you may damage the engine and the exhaust gas aftertreatment. Mercedes-Benz recommends MOBIL OIL. The table shows which engines oil have been approved for your vehicle. Model GLK 35038 GLK 350 4MATIC Engine model 272 272 MB Approval 229.5 229.5 Engine oil Points to remember The engine oils are matched to the performance of Mercedes-Benz engines and service intervals. For this reason, only use engine oils and oil filters that are approved for vehicles with a service system. Contact an authorized Mercedes-Benz Center or visit http://www.mbusa.com (USA only) for a list of approved engine oils and oil filters. Engine oil viscosity Viscosity describes the flow characteristics of a fluid. If an engine oil has a high viscosity, this means that it is thick; a low viscosity means that it is thin. Using the table below, make sure that the SAE classification (viscosity) is sufficient for the temperatures at which the vehicle is operated. The low temperature characteristics of engine oils can deteriorate significantly, e.g. by aging, soot and fuel deposits. It is therefore recommended that you carry out oil changes regularly using an approved engine oil with the appropriate SAE classification. ! Never use engine oil or an oil filter of a specification other than is necessary to fulfill the prescribed service intervals. Do not change the engine oil or oil filter in order to achieve longer replacement intervals than those prescribed. Otherwise, you may cause damage to the engine or 38 USA only. Z Technical data ! Do not refuel with low-grade fuel and do not use fuel additives that are not tested and approved for Mercedes-Benz vehicles. Damage or malfunctions can result that are not covered: Rby the Mercedes-Benz Limited Warranty Rby an existing Limited Warranty Rby an extended Limited Warranty i MB Approval is stated on the containers. Lubricant additives ! Do not mix any lubricant additives with the engine oil. This could damage the engine. Damage resulting from the use of such lubricant additives in the engine oil is not covered by the Mercedes-Benz Limited Warranty.