Hi guys,

I have a 1996 C280 and I'm trying to view the error codes through the climate control panel.

I'm following these instructions I found:


"To read the PBU's error codes follow the procedure,
Key on with enginer off
Set temperature to LO
Press REST and "Defrost" buttons at a time for over 2 seconds (must be done in 20 seconds from last step"
If you see the LED on recirc button is flashing at 1Hz freq and screen shows "diR" you are in error code retrieving mode.
Press AUTO to read a contineous error codes at a time
Continue press AUTO and write all codes in your note until screen shows End"

However, when I push REST and DEFROST at the same time, the defrost just turns on and sets my temp to "Hi" instead of "Lo" and it doesn't go into any error retrieving mode.

Am I doing something wrong or are the steps for my car different?

Thanks in advance!