What does a -400 service code in a 1999 230 slk Mercedes mean?

Answer 1

On my 1998 SLK 230, at 2000 miles before the next service is due, a wrench appears in the screen below the trip odometer at the bottom of the speedometer when the igniton is turned on. When you go past 2000 miles without servicing and reseting the maintenance service reminder, it will start counting the miles past due. -400 means you are 400 miles past due for service, most likely an oil change. When the service reminder is reset, it resets to 7500 miles until it reminds you again for the next service. If you change the oil yourself as I do, I can reset the service reminder in my 1998 by: Turn the key in steering lock to position 1 Press the trip odometer reset button and hold Turn key in steering lock to position 2 After about 10 seconds, you will hear a chime and the display will show 7500 miles Release the trip odometer reset button