Before you start, confirm your Vito’s instrument cluster type. The 2012 model year can have either the standard cluster (with a single multifunction button on the dashboard) or the steering wheel button layout. Below are the two most common methods. This works for Vitos without steering wheel menu buttons.
Once in the Service menu, use the up/down arrows to find “ASSYST PLUS” or “FULL SERVICE” . mercedes vito 2012 service reset
Turn the ignition off. When you restart the engine, the service light should be gone. Method 2: Using Steering Wheel Buttons (If Equipped) Some 2012 Vitos have a multifunction steering wheel with left/right arrow buttons and an “OK” button. Before you start, confirm your Vito’s instrument cluster
Press “OK” again to confirm.
Turn the ignition to position 1 (accessory mode – dash lights come on, but the engine is off). This works for Vitos without steering wheel menu buttons