How to Reset Mercedes A Class Service

Here is how to perform a service reset on a Mercedes-Benz A-Class, depending on the model (W176 or W177):

For Mercedes-Benz A-Class W176 (2013–2018)

1. Turn the ignition to ON (don’t start the engine; press the start button once or turn the key to position 1 or 2).

2. Make sure the trip mileage screen is showing.

3. Press and hold the "Phone Answer" button and the "OK" button on the left side of the steering wheel for about 5 seconds.

4. The workshop menu will appear.

5. Use the arrow buttons to scroll to "ASSYST PLUS" and press OK.

6. Select "Full Service", then "Confirm Service".

7. Choose the correct oil grade (such as 229.5 or 229.51).

8. Confirm with "Yes". A message will appear saying the service has been reset.

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For Mercedes-Benz A-Class W177 (2018–present)

1. Press the start button once to turn on the ignition (engine off).

2. Make sure the total mileage is displayed.

3. Press and hold the "Back" button and the "OK" button on the left side of the steering wheel for about 5–10 seconds.

4. The engineering menu will appear.

5. Navigate to "ASSYST PLUS" → "Full Service" → "Confirm Service".

6. Choose the oil specification.

7. Select "Yes" to confirm.

8. A message will confirm the service reset.

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Let me know your specific model year if you want the exact method.