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!

these threads may have the data you need.

'99 e300d - air conditioning not working
http://www.peachparts.com/shopforum/showthread.php?p=1826273

S320 AC problems
http://www.peachparts.com/shopforum/showthread.php?p=2217807

AC - Climate Control Unit - Version Coding - How to? (W202 C280 1997)
http://www.peachparts.com/shopforum/showthread.php?p=1563496

1997 W210 E320 Cliamte "P values"
http://www.peachparts.com/shopforum/showthread.php?p=1194196

c280 1997 Climate Control - classic cold + hot blow
http://www.peachparts.com/shopforum/showthread.php?p=1554056





Have a great day.

__________________
ASE Master Mechanic
asemastermechanic@juno.com

Prototype R&D/testing:
Thermal & Aerodynamic System Engineering (TASE) Senior vehicle instrumentation technician.
Noise Vibration and Harshness (NVH).
Dynamometer.
Heat exchanger durability.
HV-A/C Climate Control.
Vehicle build.
Fleet Durability
Technical Quality Auditor.
Automotive Technical Writer

1985 300SD
1983 300D
1984 190D
2003 Volvo V70
2002 Honda Civic

https://www.boldegoist.com/