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  #1  
Old 08-14-2007, 09:19 PM
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Join Date: Aug 2007
Location: Alabama
Posts: 5
99 E320 with stuck EC light

Hello all, I am new to this site, as well as to Mercedes. I have a 99 E320, with 147,000 miles, that has been having quite a bit of problems lately. The car was originally bought used by my parents, as a daily (in-town) driver to save on gas. The problems started with overheating issues. Since there is no Mercedes indy or dealer within 120 miles of their home town, I picked up the car and brought it to my repair shop. (It specializes in Mercedes and VW). There was an oil leak at the valve covers that was repaired, as well as a couple of hoses, sending temp unit and tension roller. After I got the car back, it would die after it got hot. The car would sit for about an hour and then it would start again. If I drove it farther than 30 miles, it would shut down. I sent it back to the shop and they replaced the fuel filter. I picked it up, only for the car to die before I made it home. I sent it back to the shop and after about a week, the mechanic called and asked if the car had been to anyone else. He said there was some strange oil in the compartment where the control modules are. He wasn't sure what the oil was, but said that he called a mercedes dealership and they told him they had never heard of such and there was no possible way it could have gotten there without someone deliberately putting it there. So, on this visit, the fan was replaced, as well as the crank shaft sensor, control motor for module, a new battery.

Now for the new problem. I picked the car up from the shop, drove it 60 miles and the EC light came on and got stuck. I have spent most of the day today reading the other threads on this site regarding this issue. I ran the tests and this is what I came up with...

The first time:
1 120
2 102
3 105
4 105
5 107
6 150
7 10
8 107
9 27
10 60
11 2.5
12 2.3
20 3.2
21 32
22 00
23 32
24 11.5
40 164
41 32
42 104
43 136

EB1419
EB1231
EB1234
EB1419 with the fan
EB 1241

I then added 16 to the P2 version code and got the EC light to go off, however the compressor still isn't coming on. I reread the Actual values they are as follows:

1 100
2 102
3 118
4 118
5 112
6 170
7 11
8 120
9 27
10 5.0
11 2.4
12 4.3
20 3.2
21 32
22 00
23 32
24 11.6
40 164
41 32
42 104
43 136

The DTC is only giving: EB1419 now. We have since moved to the same town as my parents and there is no where to take the car. My husband is quite good with cars, however he currently working out of state. It has been VERY hot here and I hate picking up my daughter in a car that is +100 degrees. If this is a repair that I can make, I would like to try. Or if I can't, I'd like to know what to tell the repair shop, as they don't seem know anything about these cars. Thanks so much!

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  #2  
Old 08-14-2007, 11:02 PM
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Join Date: Feb 2004
Location: Walnut Creek, CA & 1,150 miles S of Key West
Posts: 4,874
Suspect you have a leak. #8 is almost equal tto 3 thru 5 so no cooling is taking place. EC light confirms this.

#24 shows a VERY low battery charge also.
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Terry Allison
N. Calif. & Boca Chica, Panama

09' E320 Bluetec 77k (USA)
09' Hyundai Santa Fe Diesel 48k (S.A.)
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  #3  
Old 08-14-2007, 11:10 PM
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Join Date: Aug 2007
Location: Alabama
Posts: 5
A little confused

Thanks so much for you reply. I will take it in to an a/c shop tomorrow with that info. Although, I am a bit confused about the #24 reading. This battery is less than 2 weeks old. Any suggestions?
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  #4  
Old 08-14-2007, 11:13 PM
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Join Date: Oct 2005
Posts: 4,263
What was the P2 version code? If 16 had been added before, adding it again is inappropriate.

#7 reads 10. The refrigerant level should not shut the system down. I don't know why #24 reads only 11.6. That's too low. First check the battery voltage, to ensure that it's not really 11.6. My N22 reads a bit low for battery voltage, compared to the actual voltage at the battery, but yours is very low.

I don't know if perceived low battery voltage will kill the compressor, but it certainly does cut off the REST function.
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  #5  
Old 08-14-2007, 11:18 PM
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Join Date: Feb 2004
Location: Walnut Creek, CA & 1,150 miles S of Key West
Posts: 4,874
Alternator, battery or ground problem?

I think I'd get it running reliably before worrying about the AC.
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Terry Allison
N. Calif. & Boca Chica, Panama

09' E320 Bluetec 77k (USA)
09' Hyundai Santa Fe Diesel 48k (S.A.)
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  #6  
Old 08-14-2007, 11:21 PM
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Join Date: Oct 2005
Posts: 4,263
I would bet that the battery voltage itself is fine, but that N22 is underreporting it for some reason. Perhaps a bad ground.
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  #7  
Old 08-14-2007, 11:29 PM
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Join Date: Aug 2007
Location: Alabama
Posts: 5
The bad ground issue seems to continue to come up in my efforts to resolve this. It seems to make sense, as the http://www.continentalimports.com/ser_ic40142.html article states the pushbutton module is logically pogrammed to show an unrealistic value is an open circuit in the sensor or a short to ground is detected. Other than the A/C, the car seems to be fine. I have not driven as much as I normally would, but it doesn't seem to running bad.
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  #8  
Old 08-14-2007, 11:30 PM
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What are the old and new P2 version codes?
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  #9  
Old 08-14-2007, 11:33 PM
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Join Date: Aug 2007
Location: Alabama
Posts: 5
Sorry, I over-looked the P2 question. My first attempt to add 16, did not seem successful after I re-read a thread titled 1999 W210 E320 A/C problems. Just like this user, when I first attempted to read the P2, the screen flashed erratically and I was not able to read the code. On my second attempt, I was able to read the screen as 136. I then added 16. Thanks for your help on this!
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  #10  
Old 08-14-2007, 11:43 PM
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Join Date: Oct 2005
Posts: 4,263
136 is 10001000 in binary. The sixteens place is 0. Adding sixteen results in 10011000 in binary or 152 in decimal. 152 is appropriate.

Now check the battery voltage with the car running. You can check the voltage at the jump-start terminal under the hood. Check between that terminal and the engine, and also between that terminal and the body.
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  #11  
Old 08-14-2007, 11:51 PM
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Join Date: Aug 2007
Location: Alabama
Posts: 5
I'll check this first thing in the morning and post the results. You guys (and this site) have been extremely helpful. I can't thank you enough.

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