Reading codes:
- Turn on the ignition;
- Move the temperature selection knobs to the HI left and LO right positions;
- Within 20 seconds after moving the handles, simultaneously press and hold the REST and EC buttons for 5 seconds;
- The LED of the RECIRCULATION key will start flashing and OFF will appear on the display;
- Press the right AUTO button for more than 1 sec. If there are no faults in the memory, E will appear on the left side of the display and FF on the right. Otherwise, Ebl will be displayed on the left side and the fault code on the right side (please refer to the list of KV codes below);
- To display the next fault code, press the AUTO button;
- To erase codes after they have been fully read, press the right and left AUTO buttons for more than 2 seconds. The left side of the display shows d, the right side shows FF;
- Pressing the right AUTO button restores erased codes (compare with the codes recorded earlier);
- After deleting the codes, E is displayed on the left side of the display, and FF on the right side;
- Set the temperature selection knob to the normal position;
- Turn off the ignition.
Original can be found on the website MercedesMan