The Mercedes A-Class brought premium hatchback refinement to a smaller, more affordable package, complete with the brand’s signature MBUX cabin tech. All that electronics means the car tracks its own servicing closely, and the Assyst Plus system needs telling once maintenance is complete, otherwise the wrench symbol lingers. Common jobs include resetting the oil service indicator, clearing the flexible service reminder, performing a TPMS reset after pressure adjustments and recalibrating the steering angle sensor following suspension or alignment work. Since the menu structure and counter logic differ between A-Class generations, we keep the instructions separated by model so you are never guessing. Select the generation that matches your car below to jump straight to the correct reset procedures.