Why is my AdBlue light still on after filling my Mercedes?
When the adblue warning light remains after refilling, the system may need a reset or sensor check. The adblue tank level sensor or dosing unit could be faulty or clogged. After filling, drive the vehicle to allow the system to recalibrate. After topping up adblue®, do not start the vehicle until its onboard computer has validated the refill. This can take a couple of minutes but once you get confirmation it’s worked, you’re good to go.If your AdBlue level is low, a notification will appear in your vehicle’s information cluster display, and a warning light will illuminate on your dashboard. Be advised that your diesel engine is not permitted to operate without AdBlue.Manually Resetting the AdBlue Warning Light Restart the car : Simply restarting your vehicle after refilling the AdBlue tank may be enough to turn off the warning light. Perform a Driving Cycle : Sometimes, the warning light disappears after driving a certain distance or completing multiple trips.If the sensor fails, it can result in incorrect readings, causing the AdBlue system to malfunction. Electrical Problems: Wiring issues or faulty connectors can lead to intermittent faults in the AdBlue system, triggering warning lights on the dashboard.Adblue faults in Mercedes vehicles refer to issues with the diesel exhaust fluid system that reduces harmful emissions. These faults can cause warning lights to appear on the dashboard, reduced engine power, and even prevent the engine from starting.
How to reset Mercedes sensors?
Press the ‘Menu’ button on the steering wheel or dashboard. Use the digital instrument cluster to locate the tyre pressure TPMS option. Select it by pressing the ‘OK’ button. Once in the TPMS menu, choose the ‘reset’ option and confirm your selection. Access the Settings Menu: Start by turning on your Mercedes-Benz and navigating to the settings menu using the central display. Locate the TPMS Reset Button: Find the Tire Pressure Monitoring System (TPMS) reset button. This button’s location may vary depending on the model, so consult your owner’s manual if needed.
How to reset Mercedes AdBlue?
Using the buttons on your steering wheel, find the Menu selection and press it. Then, scroll down to select the Settings option. Access the AdBlue reset. Within Settings, look for options related to Vehicle or Service. Once you find these, navigate deeper to find an AdBlue Reset function. Access the AdBlue reset. Within Settings, look for options related to Vehicle or Service. Once you find these, navigate deeper to find an AdBlue Reset function. Select this option.A hard reset via battery can clear persistent AdBlue lights—but use it carefully. Turn off the engine and remove the negative battery cable; keep it disconnected for 10–15 minutes. Reconnect, restart, and attempt sensor recalibration.
How to reset warning lights on Mercedes?
Turn off the ignition and disconnect the negative terminal of the battery. Wait 10–15 minutes, reconnect, and restart the engine. This can clear the system memory in some models. Disconnecting the negative battery cable for 30-60 seconds should clear the check engine codes and reset the diagnostic system. If you set the negative battery cable to the side, make sure the cable does not touch the battery or any metal parts of the vehicle to avoid grounding the circuit.Simply place your key into the ignition and turn it on for 1-2 seconds, then turn it off for 1-2 seconds. Repeat this step three or four times. If the check engine light remains after the reset, you might still have a problem with your vehicle.
Can I drive with a faulty NOx sensor on my Mercedes?
Mechanical damage – long-term driving with a damaged NOx sensor may lead to failure of other parts of the exhaust system, such as the catalytic converter. In extreme cases, this may pose a threat to driving. A major cause of NOx Sensor failure is soot from the combustion process. This can coat the sensor and affect the reading as the sensor can no longer measure the gas effectively.