Q: Hi my ml 350 has the ad blue light on the dash and an engine managment light on ive tryed to top it up but the tank is all ready f

The first two codes point to the bank 2 sensor 2 and could be a problem with the wiring to the sensor or the catalyst is broken up and clogged the exhaust. The last code P0402 is for the EGR...

Is the Check Engine Light on? The throttle body assembly is a common failure item on this vehicle and can cause similar symptoms. In some cases, throttle body assembly (https://www.yourmechanic.com/services/throttle-body-replacement) will not open properly in accordance with the input from...

Hello. From what you describe it would appear that your vehicle is experiencing more than one issue. In regards to your starting issue, slow cranking is usually caused by a bad battery (https://www.yourmechanic.com/services/battery-replacement) or starter (https://www.yourmechanic.com/services/starter-replacement). I would start by...

Hi - engine rattle (https://www.yourmechanic.com/question/hear-engine-rattle) on startup is a common problem with this engine. The hydraulic valve lifters, actuated by engine oil pressure, drain down overnight, and it requires a few seconds for the oil pump to fully fill the...

This suggests you may have a leak due to a failing gasket or potentially a hole in your oil pan due to the rust corrosion. This suggests you may have a leak resulting from a bad oil pan gasket. This...

Hi there. First check the computer for any codes that could be stored as the check engine light is on. This will give you a starting place where the problem could be coming from. If the drivetrain control module is...

Hi Anthony. Thanks for writing in to YourMechanic.com. Based on what you've stated above in your question, it is possible that the ticking sound is coming from a loose lifter or valve rocker arm (as the dealership stated in their...

Can you pass emissions with a newly turbocharged car that has ODB-2 that does not come with a turbocharger from the factory? It is illegal to modify any factory installed emissions system on a motor vehicle. Adding a turbocharger...

Hi Marg. Thanks for sending the question tonight. Most of the time, a transmission fluid leak is caused by either a bad transmission pan gasket or a loose or frayed hydraulic line. The smell being inside the car is likely...