How to manually reset the urea system on a Mercedes GL350?
2 Answers
This requires specialized computer equipment for reset; otherwise, it cannot be reset and may affect the number of engine starts in the future. It is best to go to a 4S shop for reset as soon as possible. The specific introduction of Mercedes GL350 is as follows: 1. Power performance: The 3.0L V6 BlueTEC turbocharged diesel engine represents the most advanced technology in clean diesel engines, certified as ultra-low emissions. It delivers 240 horsepower and 455NM of torque. Mercedes-Benz has improved the original engine technology, including noise reduction, odor and emission enhancement technologies, and the injection of AdBlue solution to reduce nitrogen oxide emissions in the exhaust. 2. Safety: The vehicle is equipped with 13 airbags, including a comprehensive advanced airbag system with dual front airbags (front and side), driver knee airbag, second-row side curtain airbags, and third-row curtain airbags.
Last time I drove the GL350, I also encountered the urea warning light coming on. Manual reset isn't actually difficult. First, make sure the ignition is on but don't start the engine. Then locate the control button on the left side of the steering wheel - the one used to adjust the dashboard menu. I usually press the left/right buttons to find the 'Trip' option, then long-press the return button for about three seconds to enter engineering mode. At this point, select 'Actual Values', find the AdBlue-related option, and confirm the reset. However, note that some model years require entering a service code for reset, which you typically need to get from a dealership or professional repair shop. After resetting, remember to drive on the highway for about half an hour to let the system re-monitor. If the warning persists, it might be a sensor issue or clogged nozzle. It's best to buy a urea tester to regularly check the concentration, as running low on urea can trigger speed limitation which is particularly troublesome.
