Service products 363 Let the engine cool down before you top up the antifreeze. Make sure that antifreeze is not spilled next to the filler neck. Thoroughly clean the antifreeze from components before starting the engine. If there is a loss of coolant, do not top it up by using only water, but also add an approved corrosion inhibitor/antifreeze agent. The water in the coolant must meet certain requirements, which are often fulfilled by the use of drinking water. The water must be treated if its quality does not meet the required standards. Observe the Mercedes-Benz Specifications for Service Products, Sheet No. 310.1. Further information can be obtained from a Mercedes-Benz Service Centre.
A coolant that ensures anti-corrosion/anti- freeze protection and other important pro- tective effects is filled at the factory. The coolant is a mixture of water and corro- sion inhibitor/antifreeze agent. The corrosion inhibitor/antifreeze in the cool- ant has the following properties: R heat transfer R anti-corrosion protection R cavitation protection (against pitting) General notes Hydraulic fluids R antifreeze protection H Environmental note Mixing different oil types can affect opera- tional effectiveness and biodegradability to an impermissible degree.
R raising the boiling point Leave the coolant in the engine cooling sys- tem all year round – even in countries with high outside temperatures. Check the corrosion inhibitor/antifreeze con- centration in the coolant every six months. Have the coolant replaced regularly at a quali- fied specialist workshop. You can find the intervals for coolant change in the mainte- nance booklet. Only use corrosion inhibitor/antifreeze approved by Mercedes-Benz, according to Sheet No. 325.5 or 326.5. This prevents dam- age to the engine cooling system and engine.
Information about approved corrosion inhibi- tor/antifreeze additive can be obtained from a qualified specialist workshop or on the Internet at http://bevo.mercedes- benz.com . When renewing the coolant, ensure that it contains 50% corrosion inhibitor/antifreeze by volume. This corresponds to antifreeze protection down to Т 37 †. Do not exceed 55% by volume (antifreeze down to approximately Т 45 †). The heat dis- sipation and antifreeze may otherwise be negatively affected. The hydraulic system is filled with SAE 10 W engine oil as standard at the factory. At low outside temperatures down to Т 32 † you can use SAE 5 W-40 engine oil.
Always use the same grade of hydraulic fluid for the hydraulic system and the attached equipment/assemblies. If you change grades of hydraulic fluid, the entire hydraulic system must be fully emptied first. This includes hoses, valves, cylinders and oil filters. In addition, the attached equip- ment and assemblies must also be emptied. Otherwise, the hydraulic fluid may foam at a mixing ratio higher than 3%. Have the hydraulic fluid replaced regularly at a qualified specialist workshop. You can find the intervals for hydraulic fluid change in the maintenance booklet. Only use hydraulic fluids approved by Mercedes-Benz, according to MB Approval 228.0.
Information about approved hydraulic fluid can be obtained from a qualified spe- cialist workshop or on the Internet at http:// bevo.mercedes-benz.com . Technical data Z