Question about 2002 Mercedes-Benz C-Class

1 Answer

Battery/alternator light off and on

For the last 2 days my Battery/ Alternator light has been on, it is only on for about 3 min, then it goes out. I havn't seen it until my car has been sitting over night and I start it in the morning. Could it be both or my battery?

Posted by on

  • Juciy Jun 19, 2008

    I am going today to the local parts store to have the test both. My was pruchased used and it still has the orginal battery, my car only has 45 k miles.



    thanks

    You guys rock!

×

1 Answer

  • 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
  • 1,036 Answers

Hi there!

It will be the alternator if your battery is under 2 years old.

Batteries lose their capacity after a few years due to a process known as sulphation. White crystaline deposits form, preventing electron flow.

This can actually be reduced and eliminated thesedays by installing a desulphator, or using one in conjunction with a charger. I've recovered 3 batteries so far since I made one, two of which were scrap due to sulphation.

The battery companies don't want you to know about these - that's why batteries only have a 3 year guarantee on them.

If the alternator is faulty, it can be serviced for 1/3 of the price of new.

Hope this provides a solution for you. If so, please take a moment to rate as Fixya! Thanks.

Posted on Jun 19, 2008

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

My 2009 Chevy Malibu just had a new battery put in within the last 60 days. Then I needed a new transmission. Got it fixed. Today my battery light comes on and stays on. What is this?


The light means that your battery is not being charged properly. It could be that when the transmission was replaced, they alternator belt was not put in properly or tight enough. I'd do the following:
1. Check battery connections to make sure they are clean and tight.
2. Check the drive belt to the alternator. It should be tight and not slipping.
3. If neither of the above is the problem, fully charge the battery with a battery charger so you can drive it for a while. Don't drive it without charging or you may get stranded. Don't let the battery run all the way down either or it may ruin it.
3. Check alternator output by driving to a nearby auto store or the place you had it repaired. They usually can check your charging system for free. The alternator could have decided to malfunction, although it's pretty new.
Good luck...

Jan 03, 2017 | AC Cars & Trucks

1 Answer

We bought two new battery's a new alternator checked all fusible links from alternator to battery. Truck only runs for a few days with battery light on then we have to charge the battery. It's an 2004


open or shorted alternator circuit (control wire)
let your auto store test the alternator charging
on and off the truck.
inspect 3 wire connector for burn or lose connection
disconnect 3 pin wire and start the engine.if the light stay on you have shot to ground.

Mar 25, 2014 | Ford Cars & Trucks

1 Answer

Kia shuts off while driving


If recharging the battery makes it start/go again then its a fault in the charging/battery circuit.
Solution 1. Check alternator. It should read over 14 volts across the battery terminals with engine at tick over. If its below that its the alternator thats faulty
Solution 2. Try a different battery known to be good. any size will do for a couple of days. Batteries sometimes only last 2-3 years. yoyrs could have been on since 2006!!!!!!

Jan 28, 2014 | 2006 Kia Sorento

1 Answer

2000 Cavalier 2.2: Put in new starter. 2 days & it


The battery and alternator may have been ok.
You have a fuse or fuseable link between the alternator and battery to protect it. If you have battery voltage at the battery post and not at the alternator post, there is a break in that circuit.
If the battery cable goes to the starter, the alternator wire may go from there and that could be where the fuseable link is.
Fuseable links are special thin wires that act like fuses.

Jan 11, 2013 | Cars & Trucks

2 Answers

Battery light on my 2004 chevy trailblazer. It lasted a day then all the ABS breake light came on the the battery drained. The truck shut off. What could this be. I bought a brnad new battery 2 years ago.


The battery light comes on when there is an issue with the charging system. Most likley you have a bad alternator. With the engine running you should see a min. of 13.5 volts at the battery and better yet 14+ volts. If you have 12.5 or less than the alternator is not charging.

Once the vehicle is started the battery is no longer in play. The alternator is what keeps the power supply to the vehicle and recharges the battery for the next time you want to start the vehicle. Once battery voltage drops below 9 volts or so systems start to shut down. Eventually the battery will drain enough that the engine management system can no longer function and the vehicle will stall.

Sep 30, 2011 | 2004 Chevrolet TrailBlazer

1 Answer

I boost the battery, and it does hold a charge but only for a day or a day and a half at most. I'm not sure what could be causing this problem. The battery was purchased Last year brand new, but sat all...


if the battery holds the charge for a day or 2 wile you drive the car normally then you should check your alternator live the car 2 or 3 days after the battery was charged and check if it starts and run if it does run it another 2 or 3 days and see if the battery dies if it dies most likely your alternator is bad, your mechanic can test it with in 3 minutes to see if it is the alternator or the battery

Aug 05, 2010 | 1991 Plymouth Sundance

2 Answers

PLEASE HELP WITH VITO 108CDI , battery light came on the other day, drove for 20 min and still didnt come off.tried same again and still not charging, is this battery or alternator many thanks


Hi,
This will be your alternator as mine comes on but then goes off if you rev engine as the alternator is putting charge in the battery.
Just take van for a free test at pretty much anywhere that sell batteries.
Just need to check that when running there is 13.8v across the battery terminals.
If there is only 12v still then the alternator is dead.
If there is 13.8v then the battery is most likely dead.
Hope this helps.

Jan 26, 2010 | 2002 Mercedes-Benz Mercedes Benz Cl Class

1 Answer

91 TOYOTA 4X4 4CY BRAKE AND BATTERY LIGHT ON


might be faulty alternator, check your alternator for proper charging 13.0-15VDC. Check belts also to the alternator. replace if out of spec. Hopefully this helps

Jul 20, 2009 | Toyota Pickup Cars & Trucks

1 Answer

88 Honda Accord battery light go on then goes off


Have the alternator tesed to see if it's good, if both alternator and battery are good check the drive belt and tensioner for loseness and wear, the drive belt drives the alternator, it sounds like your alternator is having problems charging the battery, if both alternator and battery are good try changing the battery cables, good luck.

Mar 24, 2009 | 1991 Honda Accord

Not finding what you are looking for?
2002 Mercedes-Benz C-Class Logo

661 people viewed this question

Ask a Question

Usually answered in minutes!

Top Mercedes-Benz Experts

Colin Stickland
Colin Stickland

Level 3 Expert

22059 Answers

yadayada
yadayada

Level 3 Expert

71525 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...