Maintenance 301 Mowing door wiper blade ! Only direct the compressed-air, steam or water jet towards the radiator surface in a vertical direction. Ensure that the radiator fins are not damaged. Remove any dirt from the radiator fins. Damaged or dirty radiator fins can cause the engine to overheat. If there is a loss of coolant or damage to the cooling and heating system, have it checked at a qualified specialist workshop. Depending on the nature of the work per- formed by your vehicle, the engine radiator and the charge-air cooler may become heavily soiled. Check the engine radiator and charge-air cooler for soiling on the exterior every time you refuel. In extremely dirty conditions, e.g.
mowing operations, check the engine radiator several times a day and clean it whenever necessary. X Apply the parking brake. X Shift into neutral. Maintenance and care X Switch off the engine. X Remove the key from the ignition lock. X To remove: unscrew nut = on wiper blade : . X Raise wiper arm ; . X Remove wiper blade : . X Check the coolant temperature in the on- board computer ( Y page 125). Only clean the radiator at a coolant tem- perature below 50 †. X Carefully lift wiper arm ; off the wind- screen. X To fit: carefully lift wiper arm ; off the windscreen.
i Further tips on cleaning the engine radi- ator and the charge-air cooler can be found in the "Tips on maintaining the value of your vehicle" supplement. X Insert new wiper blade : . X Screw on new nut = and tighten. X Fold wiper blade : onto the windscreen. Cleaning the engine radiator and air conditioning condenser Cleaning the radiator Important safety notes G WARNING If you clean the radiator, the air conditioning condenser or the protective grid with the engine at normal operating temperature, you can burn yourself on the hot components. There is a risk of injury. Allow the engine to cool down before cleaning the radiator, the air conditioning condenser or the protective grid.
Always wear protective gloves while doing so. X Pull lever ; and swing it to the right. X Open protective grid : . Z