Alternator/Battery error "no communication with computer"
Thread Starter
Newbie
Joined: Jan 2009
Posts: 6
Likes: 0
C230 2003
Alternator/Battery error "no communication with computer"
Hi guys, I have an alternator/battery warning error on C230K 2003. I took it to some MB repair shop, they rebuilt the alternator and they said they replaced a regulator, but the error is still on. I checked the battery- it's charging fine. After testing car with a scanner. It said something like " no communication between regulator/ and computer" Repairs shop said i have to buy a brand new Alternator from MB dealers but i really don't feel like wasting another 800$
Anyone has any ideas what to do with it?
Also does anyone know where i can get a good PC software for testing Mercedes?
(i want to use USB2 on my laptop and connect it to the mercedes via special cable )
Thanks,
Anyone has any ideas what to do with it?
Also does anyone know where i can get a good PC software for testing Mercedes?
(i want to use USB2 on my laptop and connect it to the mercedes via special cable )
Thanks,
Senior Member
Joined: May 2007
Posts: 323
Likes: 1
From: Marina Del Rey,Ca.
06' BMW M3
Hey bro,seeing that this is your first post(welcome),you might want try to use the Search feature(top of thread) to see if you can answer your own question(s).At least tell us you tried to search,but were unsuccessful and are still looking for help.Good luck man.(just trying to help)
Senior Member
Joined: May 2007
Posts: 323
Likes: 1
From: Marina Del Rey,Ca.
06' BMW M3
Hi guys, I have an alternator/battery warning error on C230K 2003. I took it to some MB repair shop, they rebuilt the alternator and they said they replaced a regulator, but the error is still on. I checked the battery- it's charging fine. After testing car with a scanner. It said something like " no communication between regulator/ and computer" Repairs shop said i have to buy a brand new Alternator from MB dealers but i really don't feel like wasting another 800$
Anyone has any ideas what to do with it?
Also does anyone know where i can get a good PC software for testing Mercedes?
(i want to use USB2 on my laptop and connect it to the mercedes via special cable )
Thanks,
Anyone has any ideas what to do with it?
Also does anyone know where i can get a good PC software for testing Mercedes?
(i want to use USB2 on my laptop and connect it to the mercedes via special cable )
Thanks,
..this might be what you're looking for ...can't help you with the other...
http://www.mercedesmanuals.com/OBD_I..._Tools_s/7.htm
Super Moderator
Joined: Jun 2008
Posts: 19,942
Likes: 192
From: Llandudno, Cape Town, South Africa
late 2009 CLK 350 Coupe Elegance, '65 Jaguar S Type wires
Hi guys, I have an alternator/battery warning error on C230K 2003. I took it to some MB repair shop, they rebuilt the alternator and they said they replaced a regulator, but the error is still on. I checked the battery- it's charging fine. After testing car with a scanner. It said something like " no communication between regulator/ and computer" Repairs shop said i have to buy a brand new Alternator from MB dealers but i really don't feel like wasting another 800$
Anyone has any ideas what to do with it?
Also does anyone know where i can get a good PC software for testing Mercedes?
(i want to use USB2 on my laptop and connect it to the mercedes via special cable )
Thanks,
Anyone has any ideas what to do with it?
Also does anyone know where i can get a good PC software for testing Mercedes?
(i want to use USB2 on my laptop and connect it to the mercedes via special cable )
Thanks,
What code are you getting?
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Super Moderator
Joined: Jun 2008
Posts: 19,942
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From: Llandudno, Cape Town, South Africa
late 2009 CLK 350 Coupe Elegance, '65 Jaguar S Type wires
Thread Starter
Newbie
Joined: Jan 2009
Posts: 6
Likes: 0
C230 2003
Sorry, don't have that info. 
Have to buy that Carsoft thingy first...
Thats odd... I don't think C Class HAS any communication between regulator and computer.
Thats like an S class feature. ------------------------------------------------
Regreatfully I have a C class, but it is weird indeed. I was thinking that some wiring might be screwed up because there's nothing wrong with the car, just that stupid red error on the screen
Have to buy that Carsoft thingy first...Thats odd... I don't think C Class HAS any communication between regulator and computer.
Thats like an S class feature. ------------------------------------------------
Regreatfully I have a C class, but it is weird indeed. I was thinking that some wiring might be screwed up because there's nothing wrong with the car, just that stupid red error on the screen
MBWorld Fanatic!
Joined: Jun 2002
Posts: 7,266
Likes: 170
From: So. Oregon Coast
C230 Sport Coup + 2006 W164 ML350 + 99 Ford Escort RIP
Sorry, don't have that info. Have to buy that Carsoft thingy first...
Thats odd... I don't think C Class HAS any communication between regulator and computer.
Thats like an S class feature. ------------------------------------------------
Regreatfully I have a C class, but it is weird indeed. I was thinking that some wiring might be screwed up because there's nothing wrong with the car, just that stupid red error on the screen
Have to buy that Carsoft thingy first...Thats odd... I don't think C Class HAS any communication between regulator and computer.
Thats like an S class feature. ------------------------------------------------
Regreatfully I have a C class, but it is weird indeed. I was thinking that some wiring might be screwed up because there's nothing wrong with the car, just that stupid red error on the screen
MBWorld Fanatic!
Joined: Jun 2002
Posts: 7,266
Likes: 170
From: So. Oregon Coast
C230 Sport Coup + 2006 W164 ML350 + 99 Ford Escort RIP
Of course, 1st thing to do is check all the electrical connections.
Maybe the plug on the regulator is not seated properly.
If you did not have this error prior to the alternator replacement, it's unlikely
anything in the ECU was changed.
It's more likely something was done wrong in the repair.
I mentioned it only, because I recall reading that on more expensive
benz's there is some sort of computer hookup directly to the alternator,
sends a pulse orsomething...sorry I don't recall the details.
Makes the alternators even more stupid expensive.
C Class never had this feature, at least in the US.
Maybe the plug on the regulator is not seated properly.
If you did not have this error prior to the alternator replacement, it's unlikely
anything in the ECU was changed.
It's more likely something was done wrong in the repair.
I mentioned it only, because I recall reading that on more expensive
benz's there is some sort of computer hookup directly to the alternator,
sends a pulse orsomething...sorry I don't recall the details.
Makes the alternators even more stupid expensive.
C Class never had this feature, at least in the US.
Last edited by C230 Sport Coup; Mar 2, 2009 at 04:59 PM.
2003, alternator, battery, benz, c230, c230k, car, clearing, code, communication, computer, comunication, mercedes, no, regulator, transmison, warning
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