anybody have any info on a 2009 ml320 how to reset service message?
Go get it serviced.
see:- http://grumunkin.blogspot.com/2009/08/how-to-reset-service-indicator-on.html :-)
To reset the service indicator on a 2009 Mercedes-Benz ML550, first, turn the ignition to the "ON" position without starting the engine. Press the gas pedal three times within 10 seconds. Next, turn the ignition off, then turn it back to the "ON" position, and the service indicator should be reset. If the indicator persists, repeat the process or consult the vehicle's manual.
To reset the service light on a 2009 Ford Transit van, turn the ignition key to the "On" position without starting the engine. Press the accelerator pedal three times within 10 seconds. Then, turn the ignition off and start the engine to check if the service light has reset. If the light remains on, repeat the process or consult your owner's manual for further instructions.
2009
You don't!
press and hold right button (3) Turn ignition ON 10second countdown Release button at end of 10secs Turn Ignition OFF
Most likely you will have three buttons labeled INFO-SETUP-RESET on the inside of your vehicle. If you press info until you get to the indicator for Oil Life, you should be able to press and hold reset to...reset it. Please refer to your owners manual in future cases
To reset the service mileage on a 2009 Mercedes-Benz C180, turn the ignition to the “ON” position without starting the engine. Use the steering wheel buttons to navigate to the "Service" menu on the display. Select "Assyst Plus," then choose "Full Service" or "Service A/B," depending on what you need to reset. Confirm the reset when prompted, and your service mileage should be updated.
It is a fault detected by the module.
2009 models can be reset using the centre display panel going to "car-settings" and just scrolling down, it will not alter the long life service, for that you need a scanning tool.