sales@eurocharged.com

Thanks to the E55 guys for this one.

Press and hold the A/C Off / EC Rest button on your C32 until a different display comes up. You'll notice that there are two digits that flash on each side of the A/C screen. If you press the Auto button on the drivers side, the numbers will increment from 00-99. I have been using the 06 code and the 01 code.

01 In-car temperature sensor.
02 Outside temperature sensor.
03 Heater core temp, left.
04 Heater core temp, right.
05 Evaporator temperature sensor.
06 Engine coolant temperature.
07 Regrigerant pressure in bar (e.g. '4' is 4 bar).
08 Refrigerant temperature.
09 Not used.
10 Heater blower control voltage (normal 08-6.0, meaning .8 to 6 volts).
11 Emissions sensor voltage (to detect atmospheric gases and recirculate interior air).
12 Sun sensor voltage (to shift airflow in car).
20 Control current for auxilliary fan (electric fan on radiator, given in milliamps or mA).
21 Engine speed (x100).
22 Road speed (km/h or mph depending on installation).
23 Battery voltage at terminal 58d (as a percentage of total voltage, e.g. 99.0 = 99%).
24 Battery voltage (e.g. 12.8 = 12.8V).
40 Climate control software version.
41 Climate control hardware version.


To exit, press the A/C Off / EC Rest button again.

m3_eater

Whoa, cool. Thanks!

ScottW911

Wow, cool. And, yes, it is pretty hidden. I am just trying to figure out how I can easily read and understand the codes.

///AMG4EVER

That's sweet! Thanks.

It's funny how some of our cars are 5 years old and you can still find things here and there...

hkycoldrct

This is what they do at the dealer when they say "we'll take it back and hook it up to the computer"
I'm sure there are other cool functions that we don't know about.

Dumb question but what are you guys getting for the battery voltage?? My display flashes 06, then 1 36??
I take it 13.6 volts?????????

Eurocharged Rick

dang it! i have to quit going to out of town...everytime i do, jerry figures out something really cool about our cars!

or maybe i should go out of town more often...

360_iti

Thanks Jerry. Do you know how to change the settings?
hkycoldrct, my battery voltage is 1 42

sales@eurocharged.com

Was it running?

sales@eurocharged.com

There is a thread in the E55 forum that has more detail. On their cars, they use the temp up and down.

hkycoldrct

AMG-Jerry, yes it was running. Battery low, alternator in the fritz????

sales@eurocharged.com

If you have never replaced your battery, then it could be time.

I would check it one more time to be sure.

FrankW

thx to Jerry for the thread...car won't turn over...checked the voltage...9.5 volt...

suspected cause...burnt out license plate bulb caused an open loop and drain the battery...

sales@eurocharged.com

Good to know!

MJ50

great find!
i just printed it out....
can someone find the rest of the codes? curious if others are also meaningful...

ohlord

the same system or very close,one of the members on the w210 forum,wrote this nice program,has helped a lot of our members with a/c problems
http://www.eclassbenz.com/node/27
ohlord
"GOT CODES?"
you only need to read values 1-8 and then do the error mode test and record those numbers.........