Version Coding
WARNING: This page is about a different car, the 1998 Mercedes-Benz C43, 1998 Mercedes-Benz C280, and 1998 Mercedes-Benz C230. However, it is still accessible from the selected car via links, so may be relevant.
Version coding allows different settings to be programmed within A/C push-button control unit. Engine version is automatically transferred from the instrument cluster to the A/C push-button control unit by the serial interface (K1). All other version coding is done using manufacturer's Hand-Held Tester (HHT). When performing version coding follow HHT screen prompts and select desired settings. See A/C PUSH-BUTTON CONTROL UNIT VERSION CODING table. For entering version code to A/C push-button control unit, perform procedures as follow:
- Turn ignition off.
- Press and hold the REST button.
- Turn ignition on.
- Release REST button. REST button LED indicator will flash, all other LEDs will be off. A/C push-button control unit will function as if in "O" (off) position. Display will indicate "- - P".
- Press the recirculation button to scroll through version codes to desired code.
- To enter desired version code press the EC button. Previous version code will be overwritten.
- Turn ignition off to return A/C push-button control unit to normal operation.
- Reset left and right temperature settings.
A/C PUSH-BUTTON CONTROL UNIT VERSION CODING
| Displayed On A/C Push-Button Control Unit | Preliminary Setting |
|---|---|
| COD | New A/C Push-Button Control Unit Not Yet Programmed |
| 00 | Serial Interface K1 |
| 02 | Serial Interface K1 & K2 |
| 10 | Serial Interface K1 & K2 With A/C Refrigerant Fill Level Switched Off |
| 18 | With Engine Cooling Fan |
| 32 | Auxiliary Cooling Fan Not Available |