C-Class (W203) 2001-2007, C160, C180, C200, C220, C230, C240, C270, C280, C300, C320, C230K, C350, Coupe

Light sensor -Visit workshop-

Old Mar 18, 2010 | 05:42 AM
  #1  
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S204 220 CDI "AMG" Mopf
Light sensor -Visit workshop-

I get mal function in cluster and I cant communicate with sensor by Star (at overhead controller). I have changed sensor but nothing. Have readed that battery could be reason, But I dont think Battery is way its end because I cant communicate even car is running and voltage 13,7V. I think that problem comes when using star and change settings but not sure. Have checked F-Sam and EGS and light sensor codeing are there..
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Old Mar 18, 2010 | 01:45 PM
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Battery.
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Old Mar 18, 2010 | 03:10 PM
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S204 220 CDI "AMG" Mopf
Originally Posted by acr2001;
Battery.
So tell me why I cant even comminicate by star to sensor? I just can't believe that battery is over because it gives error also if you have drived like 200km and shut down car and start again. Have readed that Mal function disapears after driving and start again.

I also use Auxilary heater dayly (whole winter) so I think it will kill bad battery very short time if it is broken. I have set voltage down limit to aux. heater to 11V and it have ever stopped for that..

EDIT:
I made test tonight. I put battery charger to my car so we will see tomorrow is the battery problem..

Last edited by simppa80; Mar 18, 2010 at 03:13 PM.
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Old Mar 18, 2010 | 03:28 PM
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Originally Posted by acr2001
Battery.
+1

Exactly. Happened to me. I started to notice my radio cuts off when I crank my car, and my windows stop dead. New battery, all is well.

If you change your battery, call for roadside assistance. Cheaper than going to the dealer!
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Old Mar 18, 2010 | 03:37 PM
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We will se tomorrow morning is battery broke. I think it cant give error when I charge it whole night..

Do you sensor still work with errors? Light and rain sensor both not working for me..
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Old Mar 18, 2010 | 06:41 PM
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My first guess would be the battery also. I had the same message show up on my instrument cluster. The error message/malfunction would disappear after driving for about 15 minutes or more, then re-starting the car.
Error message did not return when the battery was replaced.
There have been other posts on this forum regarding this.
Let us know when you solve the problem. Good Luck.
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Old Mar 18, 2010 | 08:42 PM
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battery

went thru this like 1 month ago mine did that on and off for 3 months changed battery never happened again
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Old Mar 19, 2010 | 02:55 AM
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Battery charged at last night. Still mal function..
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Old Mar 19, 2010 | 07:42 AM
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yup and i charged mine many times too and it still did it

if you have a weak bat even fully charged as soon as you crank the engine is sucks the power down

go get it load tested at MB my dealer tested mine for $21.00 and when it failed and i told him to replace it he waived the 21.00
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Old Mar 19, 2010 | 07:45 AM
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Originally Posted by contact148
yup and i charged mine many times too and it still did it

if you have a weak bat even fully charged as soon as you crank the engine is sucks the power down

go get it load tested at MB my dealer tested mine for $21.00 and when it failed and i told him to replace it he waived the 21.00
Thanks for that. I haft to go battery test soon.
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Old Mar 19, 2010 | 12:53 PM
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Originally Posted by simppa80
Battery charged at last night. Still mal function..
Battery.
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Old Mar 19, 2010 | 03:43 PM
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Originally Posted by acr2001;3991735 begin_of_the_skype_highlighting**************39917 35******end_of_the_skype_highlighting
Battery.
I still wonder why cant get connection with star. If I get other ar next to my and we use battery starting cables I think it should not give error after start my car. Am I right?
Richard from england (guru) think problem in my star but have now tryed other version, so it was not it. My battery voltage today 12.2V before starting.

Last edited by simppa80; Mar 19, 2010 at 03:45 PM.
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Old Mar 19, 2010 | 05:54 PM
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my car had an issue connecting to star once they ended up restarting it and it fixed the problem. but yeah light sensor always seems to be power related.
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Old Mar 21, 2010 | 12:25 PM
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Originally Posted by simppa80
I still wonder why cant get connection with star. If I get other ar next to my and we use battery starting cables I think it should not give error after start my car. Am I right?
Richard from england (guru) think problem in my star but have now tryed other version, so it was not it. My battery voltage today 12.2V before starting.
I can't believe you're wasting all this time. How old is the battery?! 12.2V is low. If you're going to be this way about it, then why not at least swap the battery out with a good one from another car to test? The lack of "communication" with the sensor through SDS is exactly what happens when you have a bad BATTERY because it is glitching. This is a well known problem. Is your battery from 2005? If so just change it!!

Once again: Battery.
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Old Mar 21, 2010 | 01:43 PM
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Originally Posted by acr2001
I can't believe you're wasting all this time. How old is the battery?! 12.2V is low. If you're going to be this way about it, then why not at least swap the battery out with a good one from another car to test? The lack of "communication" with the sensor through SDS is exactly what happens when you have a bad BATTERY because it is glitching. This is a well known problem. Is your battery from 2005? If so just change it!!

Once again: Battery.
+1

Sir, just change the battery. Many of us have had to go through this methodically queer way of figuring out we need a new battery. We're trying to make it easy for you. CHANGE IT.
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Old Apr 1, 2010 | 10:16 AM
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-1 BATTERY!

Now battery tested by professional and there is results. They told that it is totaly waste off money to change health battery. So tell me next place were try to find fault reason?

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Old Apr 1, 2010 | 11:11 AM
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:p well good thing you didnt listen to everyone and just change the battery ! sorry had to add that in there, i have nothing productive to say other than goodluck!
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Old Apr 1, 2010 | 01:43 PM
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people have gotten there battery tested before and it passed but once they replaced it error goes away. if you don't want to do that i recommend going to a dealer.
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Old Apr 1, 2010 | 02:24 PM
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Originally Posted by samaritrey;4013378 begin_of_the_skype_highlighting**************40133 78******end_of_the_skype_highlighting
people have gotten there battery tested before and it passed but once they replaced it error goes away. if you don't want to do that i recommend going to a dealer.
So now I think If I connect my car to others car Battery (running and charges like 13,8V ) with cables, the error should go away?


If I go to our dealer I think they:

1. Change light sensor (already changed)
2. Change Overhead control unit
3. Change Front SAM and so on..

I have my Own star but can't connection to Light sensor unit, overhead unit I can.

EDIT: They are very helpful in local part delaer and I would ask to give they new battery to try ..
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Old Apr 12, 2010 | 05:47 AM
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Tested with other battery with no results

Now I had made test with other car battery. Other car was running next to mine with 13.4V and I use cables. It just gives light sensor fault. Mine own think is that DBE (over head panel) is faulty. It gives can fault for light sensor. I cant get any connection to my light or rain sensor by Star. Also SAM-F gives can-communication fault to DBE.
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