Sequence of works
1. Check the tightness of the hoses on the radiator, engine and interior heater radiator.
2. Check the condition of the hoses by bending them. Replace any hard, brittle or cracked hoses.
3. Check the tightness of the hose connections on the inlet pipes.
4. Check if the clamps are tightened well. If the clamps are not tightened tightly, fluid may leak and the fasteners will be subject to corrosion. Replace rusty clamps.
Full article available on the resource: MercedesMAN.ru