Maintenance 291 R do not use any additional anti-corrosion agents. You must secure the vehicle on axle stands of sufficient load-bearing capacity if work is being carried out underneath the vehicle. Never use the jack instead of stands. The jack could slip and the vehicle could drop. The jack is designed only to raise the vehicle for a short time, e.g. while a wheel is being changed. When working on the vehicle, comply with all safety regulations, such as operating instruc- tions, regulations concerning hazardous materials, environmental protection meas- ures, work safety and accident prevention regulations.
The enclosed Maintenance Booklet contains information on the scope and frequency of maintenance work and notes on warranty, service products and maintenance work. A qualified specialist workshop will confirm the work that has been carried out in the Maintenance Booklet. Inspection and maintenance work requires special skills that cannot be acquired by read- ing these Operating Instructions. Always have this work and maintenance work carried out by a qualified specialist workshop. R whenever the vehicle is used in extreme conditions, such as winter road service operations using wet salt, remove all traces of corrosive substances with water afterwards.
The Unimog's chassis and underbody have been treated with a special dual-layer protec- tive coating. This dual-layer protection consists of a pene- trating wax (Carlofon 3650) and an under- body protection wax (Carlofon 4941). The penetrating wax improves the anti-corrosion protection on moving parts and at gaps, joints and overlaps. The underbody protection wax permanently seals the chassis. Maintenance and care i Other useful tips on vehicle care can be found in the "Tips on maintaining the value of your vehicle" supplement.
Maintenance Important safety notes H Environmental note If circumstances require you to do some main- tenance work yourself, you must observe the environmental protection requirements. When disposing of service products, e.g. engine oil, you must comply with the legal requirements. This also concerns all parts, e.g. filters, that have been in contact with ser- vice products. Dispose of empty containers, cleaning cloths and care products in an environmentally responsible manner. Observe the instructions for care products. Do not let the engine run longer than neces- sary when stationary.
Opening/closing the front flap Overview G WARNING If you open the front flap while the engine is overheating or while there is a fire in the engine compartment, you could come into contact with hot gases or other leaking ser- vice products. There is a risk of injury. Allow an overheating engine to cool down before opening the front flap. If there is a fire in the engine compartment, leave the front flap closed and notify the fire brigade. Like all technical equipment, the vehicle requires care and maintenance. The scope and frequency of maintenance work mainly depends on the operating conditions, which can differ widely. Z