Driving 161 key, the on-board computer will show an event window. Use a valid spare key. In the event of loss of pressure while driving, immediately bring the vehicle to a halt in accordance with the traffic conditions. Secure the vehicle using the parking brake. Have the compressed-air system repaired at a qualified specialist workshop. X Shift into neutral. X Check the engine oil level ( Y page 125). X Make sure that the engine-driven power take-off is disengaged ( Y page 265). X Make sure that the front PTO shaft is dis- engaged ( Y page 268). X Start the engine. X Turn the key to start position 3 in the igni- tion lock. Do not depress the accelerator pedal whilst doing so.
X Leave the engine running until the J warning lamp in the instrument cluster goes out. Driving mode X If the engine starts normally, release the key. The idling speed is controlled automati- cally. i The engine idling speed is raised at very low outside temperatures or during regen- eration of the diesel particle filter. The starting procedure is automatically cancelled after approximately 60 seconds. X Call up the Reserve pressure menu win- dow ( Y page 124) and check the current reservoir pressure.
Observe the event window in the on-board computer and the indicator lamps in the sta- tus area of the on-board computer/instru- ment cluster on the reservoir pressure and the compressed-air brake system. Checking the reservoir pressure in the transmission/clutch circuit X If the engine fails to start: rectify the cause of the poor starting characteristics. Possible causes of poor starting characteris- tics are, for example: G WARNING If there is a loss of pressure or insufficient reservoir pressure in the transmission/clutch circuit, you can no longer shift gears. There is a risk of an accident.
Do not pull away, or stop the vehicle as soon as possible, paying attention to road and traf- fic conditions. Secure the vehicle against roll- ing away, e.g. with the parking brake. Have the compressed-air system repaired at a qualified specialist workshop. R a blocked fuel filter R an empty fuel tank ( Y page 216) R fuel system not bled ( Y page 322) X Repeat the starting procedure. X If the engine still fails to start, contact a qualified specialist workshop. Safety inspection The reservoir pressure in the transmission/ clutch circuit is supplied once brake circuits 1 and 2 have been charged.
If the reservoir pressure in the transmission/ clutch circuit is too low, the on-board com- puter displays the yellow : Transmis‐ sion/clutch reserve pressure too low event window. Checking the reservoir pressure in the compressed-air brake system G WARNING It is not possible to brake the vehicle if the compressed-air brake system has a leak or if there insufficient reservoir pressure. There is a risk of an accident. Do not pull away until the required reservoir pressures have been reached. X Start the engine. X Leave the engine running until the yel- low : Transmission/clutch Z