114 Instrument cluster On-board computer and displays Once the AdBlue ® tank has been refilled or the fault rectified, full engine output is restored. If the system check does not detect any other faults, the ; indicator lamp goes out after the system's status indicator. It may take several journeys to complete the system check. BlueTec ® exhaust gas aftertreatment status indicator The second phase indicates the system check status. The indicator lamp either lights up again for five seconds or flashes for approx- imately five seconds. Subsequently, it goes out for five seconds. In the third phase, the indicator lamp indi- cates whether any emissions-related mal- functions have been detected.
If no emissions-related malfunctions are detected, the indicator lamp lights up briefly and then goes out for approximately five sec- onds. This flashing sequence is repeated until the engine is started. The status of the BlueTec exhaust gas after- treatment is signalled for a quick on-site check by authorities. There are three successive signalling phases shown by the ; indicator lamp. These commence when you have turned the key in the ignition lock to position 2 , and end when the engine is started. The first phase is the instrument cluster dis- play check. The indicator lamp lights up for approximately five seconds and then goes out for approximately ten seconds.
Problem Possible causes/consequences and M Solutions The ; indicator lamp lights up. The engine power out- put is reduced. The on- board computer also shows an event window in the display. You have not had a detected emissions-related malfunction rec- tified. X Follow the instructions in the event window. X Drive carefully to the nearest qualified specialist workshop and have the malfunction rectified as soon as possible. If you do not follow the instructions in the event window, a speed limitation may be imposed, as per the message displayed: R20 hours after the first occurrence of a malfunction, e.g.
if a low- grade diluted reducing agent is being used or if the dosage is incorrect R100 hours after the first occurrence of a malfunction, e.g. if the exhaust gas recirculation or if the monitoring system is faulty The ; indicator lamp lights up. Vehicle speed is limited to approx. 20 km/h. Simultaneously, the on- board computer shows the · indicator lamp in the status area. AdBlue® has been used up or a detected emissions-related mal- function has not been rectified. X Follow the instructions in the event message. X Drive carefully to the nearest filling station and refill AdBlue® (Y page 218).
or X Drive carefully to the nearest qualified specialist workshop and have the malfunction rectified as soon as possible. The operating permit is invalidated if you continue to use the vehi- cle.