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1996 E320, 1992 300E, 1987 300E
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Discussion Starter #1
HELLO ALL, i AM KINDA NEW TO THE FORUMS AND WAS WONDERING IF ANYONE HAS EVER EXPERIENCED THIS PROBLEM. MY AC UNIT IS STUCK IN EC MODE. I CAN'T TURN OFF THE ECONOMY FEATURE. IT WORKED FINE PREVIOUSLY BUT I REPLACED THE BATTERY AND NOW IT IS JUST LOCKED IN ECONOMY MODE NO MATTER HOW MANY TIMES I PUSH THE EC BUTTON IT WILL NOT TURN OFF. WHAT COULD BE CAUSING THIS?
 

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I'm having the same problem, I posted a similar request and received a link to some diagnostic codes:

Somewhat common problem I think. All the details are here -

http://www.mercedesshop.com/shopforum/showthread.php3?s=&threadid=86110

Especially read the second page.

I ran the daignostic mode and receive the below liste output:
Actual Output

1 80
2 69
3 93
4 94
5 89
6 155
7 00
8 93
9 27
10 3.0
11 3.2
12 4.3
20 3.2
21 32
22 00
23 32
24 11.4
40 164
41 91
42 72
43 136

Diag Error codes:
eb1 234
eb1 416
eb1 422
eb1 241
e ff
e

I'm not sure how to interpret this data.

Scott
 

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31 Posts
From the above reply...

"I ran the daignostic mode and receive the below listed output:" etc. etc.

How is the diagnostic mode run? I have read other posts where diagnostic information is displayed, but can't find an explanation of how or where or by whom this information can be accessed.

Thanks,

Brian - Yakima, WA
2000 E320
 

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SLK320, MKV Jetta TDI, Mini Cooper S, Lincoln Mark LT
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Press and hold the REST button. Within a few seconds the display switches over to a diagnostic mode. Use the Left and right AUTO switches to scroll through the list:

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.
 

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1996 E320, 1992 300E, 1987 300E
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9 Posts
Discussion Starter #5
thanks guys for all of your help.
Took my car to the shop today and was informed that my refrigerant was low which causes the compresser to
not be allowed to come on. after a quick charge the EC light went off. they also injected dye into the system to detect leaks. Will have to take back in a couple of days for follow up to see where leak is coming from.
 
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