Question about 2003 Mercedes-Benz C-Class

2 Answers

2003 Mercedes C320 Coupe\r\nBattery/Alternator

2003 Mercedes C320 Coupe Battery/Alternator visit workshop malfunction message

I was driving home last week and my car died due to a bad alternator. My headlights shut off, abs deactivated and the car went into a limp mode state. I pulled the vehicle into the nearest service station and had it towed to my mechanic. My mechanic replaced the alternator and the battery. The car drives great but we were unable to get the battery/alternator warning visit workshop message to go away. We tested the battery and alternator, and everything seems to be charging and working. I even left the vehicle for 3 days and it started right up. What could be causing this warning to stay on? Is their something I can try to clear the warning? My mechanics diagnostics do not show any error codes at all. What i thought was a minor problem is turning into an expensive one.

Posted by on

2 Answers

  • Level 2:

    An expert who has achieved level 2 by getting 100 points

    MVP:

    An expert that got 5 achievements.

    Novelist:

    An expert who has written 50 answers of more than 400 characters.

    Governor:

    An expert whose answer got voted for 20 times.

  • Expert
  • 128 Answers

There is a TSB (technical service bulletin) affecting these models for faulty voltage regulator on the alternator. This should be checked, as well the alternator diode output should be checked with an oscilloscope to ensure no bad diodes, even in a new alternator. Also codes can be cleared in one of two ways, with a global obd II scanner or with the Mercedes scanner (dlc located in engine compartment right rear). also all wiring and connections should be checked for high resistance. hope this will help with your problem otherwise bring it to certified Mercedes dealer and have it checked / cleared. good luck

Posted on Feb 05, 2010

  • Level 3:

    An expert who has achieved level 3 by getting 1000 points

    All-Star:

    An expert that got 10 achievements.

    MVP:

    An expert that got 5 achievements.

    Genius:

    An expert who has answered 1,000 questions.

  • Master
  • 1,341 Answers

If you have a warning light then you need the appropriate diagnostic tool connected to this vehicle.The right equipment connected to this vehicle should clear this warning, I suggest you contact a proper merc dealer/repairer. There is a cable called EL 327 which you could buy off ebay for around 30 usd and I have personally tested it and I have referred more than 50 clients here and all have succeeded in using this tool.Now it is up to you to decide if you want to pay for this service or else get yourself this diagnostic tool which would be quite handy in future.Another advice is to ask if this would work on merc.
Vehicles I tested are : vaiuxhall, opel, nissan, ford ( Uk), Now I do not have a list of vehicles for my clients but they all suceeded.Yours is a post 1997 and thus uses OBD 2 technology.Now this warning light came up as there was a fault on the car and even though you have fixed this problem, the computer memory of the car still think there is a fault and can only be corrected using a diagnostic tool.Hope this helps.

Posted on Feb 05, 2010

1 Suggested Answer

6ya6ya
  • 2 Answers

SOURCE: I have freestanding Series 8 dishwasher. Lately during the filling cycle water hammer is occurring. How can this be resolved

Hi,
a 6ya expert can help you resolve that issue over the phone in a minute or two.
best thing about this new service is that you are never placed on hold and get to talk to real repairmen in the US.
the service is completely free and covers almost anything you can think of (from cars to computers, handyman, and even drones).
click here to download the app (for users in the US for now) and get all the help you need.
goodluck!

Posted on Jan 02, 2017

Add Your Answer

Uploading: 0%

my-video-file.mp4

Complete. Click "Add" to insert your video. Add

×

Loading...
Loading...

Related Questions:

1 Answer

2004 MERCEDES E320 READS MALFUNCTION BATTTERY ICON WITH MESSAGE VISIT WORKSHOP, for weeks while car functions flawlessly.


Your alternator is not putting out enough power to recharge your battery.. Your battery will eventually drain.

Mar 01, 2017 | 2004 Mercedes-Benz E 320

2 Answers

Dashboard message to visit workshop w/ picture of battery


Your battery are okay but you may have an alternator/generator problem, it's not charging back electricity to the battery. That's the common interpretation of that battery warning light on the dash...

Oct 03, 2012 | 2005 Mercedes-Benz Mercedes Benz E320 Cdi

1 Answer

How do i reset servise brake visit workshop message?


first check the brake fluid, if need fill it up by right brake fluid, if it's not help you must drive the car to Mercedes experienced workshop better way go to dealers workshop for diagnose, is this information helped you?

Oct 30, 2010 | 2003 Mercedes-Benz E-Class

1 Answer

2003 Mercedes C320 coupe. Car died on my way home


Hi ddansvob-

Most of the codes for Mercedes C320's can be cleared (at least temporarily) by disconnecting the negative terminal of the battery and leaving it disconnected for at least 1 minute. I would give it several minutes just to be sure.

There is also a reset procedure that you can use that involves disconnecting the battery, turning the ignition to position 1 several times and then reconnecting the battery. That procedure can be found with a google search.

Possibly the easiest way though is to visit an Autozone or other similar store that has an OBDII scanner that they will use for free on your car, and have them reset the codes. If there is an actual issue with a sensor, etc. though, the code will come back up after the car has been started a time or two. If that is the case, you are going to have to troubleshoot the actual cause of the code, involving finding a Mercedes shop that will help you with identifying what sensor(s) are causing that code to show up.

If your mechanic used non-OEM parts/battery, that is very likely to be the source of your problem. Assuming that they didn't do that (which would be unusual for any mechanic to do), you are likely looking at replacing a voltage sensor or part of the voltage regulating/distribution system. If you get to that, you are REALLY going to need an experienced Mercedes mechanic.

Good luck!

Feb 05, 2010 | 2002 Mercedes-Benz C-Class

2 Answers

Battery alternator visit workshop is flashing on


MERCEDES C200 Kompressor 2001. battery alternator visit workshop is flashing on trip computer. i have replaced alternator. everything is ok. battery getting charge... i cant see any thing wrong so why workshop flashing?? maybe something wrong with new alternator 4 exampel voltage sensor??

Jan 02, 2010 | 2003 Volkswagen Passat

1 Answer

Battery not charging/visit workshop light on


or could possible be the alternator over charging

Oct 05, 2009 | 2006 Mercedes-Benz Mercedes Benz CLS500

1 Answer

2003 C320 - 'Battery under voltage, switch consumers off'


when the vehicle voltage supply gets low, the car will shut down high current consumers (seat heaters, climate control fan, etc) until the voltage stabilizes. you might have a battery going dead, or the alternator might be wiggin out and not charging at times or when it gets hot. There have been many issues with the "alternator voltage regulator" mounted on the back of the alternator, failing completely or failing intermittently and under load. How old is your battery? Have you had to jump start the car recently?

Mar 15, 2009 | 2001 Mercedes-Benz C-Class

Not finding what you are looking for?
2003 Mercedes-Benz C-Class Logo

Related Topics:

900 people viewed this question

Ask a Question

Usually answered in minutes!

Top Mercedes-Benz Experts

Colin Stickland
Colin Stickland

Level 3 Expert

22095 Answers

yadayada
yadayada

Level 3 Expert

75005 Answers

Michael Contreras
Michael Contreras

Level 2 Expert

166 Answers

Are you a Mercedes-Benz Expert? Answer questions, earn points and help others

Answer questions

Manuals & User Guides

Loading...