140 On-board computer event window Engine and cooling On-board computer and displays Display messages Possible causes/consequences and M Solutions 5 Engine oil pres‐ sure too low Supplementary text Û: Stop vehicle. Switch off engine. The 5 indicator lamp lights up red in the status area of the on- board computer as well as in the event window. The engine oil pressure is too low. The operating safety of the engine is jeopardised. X Stop the vehicle as quickly as possible, paying attention to traf- fic conditions. X Switch off the engine. X Apply the parking brake. X Check the engine oil level (Y page 125) and top up oil (Y page 297). X Consult a qualified specialist workshop.
, Coolant level too low Supplementary text Û: Top up coolant. The * indicator lamp lights up in the status area of the on-board computer as well as in the event window. As long as the * indicator lamp is lit, the coolant temperature cannot be displayed. The coolant level has dropped to approximately 1 litre below the normal filling level. The operating safety of the engine is jeopar- dised. X Stop the vehicle as quickly as possible, paying attention to traf- fic conditions. X Switch off the engine. X Apply the parking brake. X Top up the coolant (Y page 293). X Have the engine cooling system checked for leaks at a qualified specialist workshop.