Maintenance 305 X Compressed-air brake system, circuit 1 compressed-air reservoir ; : remove covering cap = . H Environmental note Improper handling of service products is haz- ardous to the environment. Do not allow service products to enter the sewage system, surface waters, ground water or soil. Checking the vehicle assemblies X Press release valve : upwards and drain off the condensed water. X Press on covering cap = . Check the vehicle assemblies for leaks regu- larly. If fluid loss is identified, e.g. by oil drops on the parking area, have the cause of the fluid loss rectified as quickly as possible at a qualified specialist workshop.
Maintenance and care Checking the anti-corrosion protec- tion X Compressed-air brake system, circuit 2 compressed-air reservoir : : open drain plug ; by a maximum of a ј revolution and drain off the condensed water. ! Road salt has a corrosive effect. In winter, wash the vehicle more frequently in order to remove salt residue. Salt residues can otherwise damage the anti-corrosion pro- tection. X Tighten drain plug ; . The vehicle can be provided with Mercedes- Benz protective chassis sealing. The Mercedes-Benz protective chassis sealing is an anti-corrosion wax with outstanding pro- tective qualities.
On vehicles without Mercedes-Benz protec- tive chassis sealing, the cab is provided with body cavity protection and underbody pro- tection. X Check the vehicle regularly for corrosion damage, particularly the compressed-air and hydraulic lines. X Compressed-air reservoir for tyre pres- sure control system : : open drain plug ; by a maximum of a ј revolution and drain off the condensed water. X As a precautionary measure, spray the underside of the vehicle with a wax-based protective agent. X Tighten drain plug ; . X Have any damage to the factory-fitted anti- corrosion protection rectified at a qualified specialist workshop.
X If more than 4 cl of condensed water leaks from a drain plug or a release valve, or the malfunction occurs regu- larly: have the compressed-air brake sys- tem and the compressed-air dryer checked at a qualified specialist workshop. X Vehicles without Mercedes-Benz protec- tive chassis sealing: as a precautionary measure, spray the underside of the vehicle with a wax-based underbody protective agent according to Sheet No. 385.1 of the Z