Operation
Diesel engine
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Coolant temperature too high. Shut off engine, determine and fix the cause (e.g. clean
the radiator).
Coolant level too low. Shut off engine and immediately refill coolant.(See Page 383)
Serious engine problems! Turn off the engine IMMEDIATELY and call customer ser-
vice.
Error in engine control.
Air filter dirty! Immediately perform maintenance on the air filter!
Fuel prefilter insert at the electric pump is dirty! Exchange the filter, because soon loss
of engine power is to be expected. (See Page 371)
Warning stage 1 from 600 mbar is absolute: Prefilter change due soon
Warning stage 2 from 570 mbar is absolute: Change prefilter now
Warning stage 3 from 540 mbar is absolute: Change prefilter now, the engine turns off
automatically
Engine fuel fine filter is blocked! Exchange the filter, because soon loss of engine
power is to be expected. (See Page 371)
Spare fuel quantity reached! When this warning icon is displayed on the R-Touch, the
spare fuel quantity set by you has been reached.
AdBlue
®
reserve quantity reached. When this warning icon is displayed on the R-
Touch, the spare fuel quantity of AdBlue
®
set by you has been reached, (only with
RT6c)
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