checking obd codes thru a/c

[joesc280]

i heard that you could read the check engine codes by performing some sort of sequence on the climate control.....how do you do this....i have an older 202.....any help would be appreciated...

[GDawgC220]

that would be interesting to find out....as I have a pre 96 w202 as well...

[WeatherMan]

Check this thread on mercedesshop Codes through A/C and this article Import Car article.
Looks like it will show climate control data as well as some other data- never knew about this until now, thanks for bringing it up.

[joesc280]

Moderator

Registered: Mar 2000
Location: Gainesville FL
Posts: 4109
I'm not sure I understand. Are you talking about your outside temp display or the engine temp display.

If you really want some data. Try this. Place your A/C Temp at "LO" and press the "REST" button for five seconds (with ignition on - the car can be driven - but pay attention). The "LO" will change to 01 and the right side of the display will give a temperature. (This works on all 95 and later 202,210,208, chassis and also works on 140 by placing the left temp LO).

The number 01 can be changed by pressing the + blower button (this changes to 02, hitting the "-" blower button goes backward, 140 chassis use the AUTO button). There are numbers from 01 up to around 50. They give the values for many things including ALL of the temp sensors (heater cores, evap, ambient, incar, engine), engine speed, vehicle speed, A/C high side pressure, refrigerant temp, whether gas or diesel, version coding, emerg A/C off signal from engine management and others.

The evap temp is 06 if I recall. Placed in the 06 position one can drive around and monitor evap temp. (I like this function for evaluating A/C performance). Since I am at home I don't have the list. Most of the important things are in the first 10-15 values. Most are indentifiable with some observation.

[seth0941]