Note: Observe the precautions given in Section Checking the condition and replacing engine compartment hoses, localizing leaks.
1. If, as a result of the inspection carried out in accordance with the recommendations given in Chapter Routine maintenance, You have found damage to any hose, it must be replaced.
2. Drain the cooling system (refer to Chapter Routine maintenance). If you are not going to add new fluid to the system, save the drained fluid for future use.
3. Use pliers to squeeze the antennae of the standard clamps (or use a screwdriver to loosen the screws of the screw-type clamps - if installed). Move the clamps to the side. Carefully remove the hose from the pipes. New hoses are much easier to remove than old ones.
4. If the hose does not come off the pipe, try to twist it. Do not damage the pipes when trying to remove the hose. Breakage can lead to expensive repairs. Keep in mind that the radiator pipes are quite fragile, so do not apply much force when removing the hoses from them. If the hose still does not come off, cut it off, then cut the remaining piece along the pipe and remove it. The cost of a new hose is not comparable to the cost of a new radiator. Before cutting the hose, make sure that you can buy a new one.
Material taken from a web resource (mercedesman.ru)
5. When installing a new hose, first put the clamps on it, then install the hose on the nozzles. If clamps of the compression type were originally installed, replace them with screw-type ones. To facilitate the installation of rigid hoses, wet the inner surfaces of their ends with soapy water or heat them in hot water (do not lower the hose into boiling water - it may delaminate).
6. After installing the hose on the pipes, check that it is correctly laid in the engine compartment. Install clamps on the ends of the hose, placing them behind the flared pipes, and tighten them.
7. Fill the cooling system (refer to Chapter Routine maintenance).
8. Start the engine and check for coolant leaks from the serviced unit.