Mercedes

Have Mercedes Questions? Ask a Mechanic for Answers ASAP

Ask an Expert,
Get an Answer ASAP!

Mercedes

I have a 2003 500SL it has been to a Mercedes dealer The

Customer Question
I have a 2003 500SL...
I have a 2003 500SL it has been to a Mercedes dealer The Electric consumers offline comes up they replaced 2 batteries an the altenator and still not fixed now they also said they did a hard reset to the computer to no avail
Submitted: 1 year ago.Category: Mercedes
Show More
Show Less
Ask Your Own Mercedes Question
Answered in 4 hours by:
10/9/2016
Mercedes Mechanic: Lou P. master tech, Mercedes Technician replied 1 year ago
Lou P. master tech
Lou P. master tech, Mercedes Technician
Category: Mercedes
Satisfied Customers: 5,083
Experience: 15 years master certified 100% fix rate and have access to factory radio codes, wiring, and instructions.
Verified

Hello, my name is***** and i will do my best to assist you.I am going over your story now and will reply back soon with some info,thanks!

Ask Your Own Mercedes Question
Mercedes Mechanic: Lou P. master tech, Mercedes Technician replied 1 year ago

couple of questions for you

  1. how many miles are on the car.
  2. how often do you drive it
  3. did they say anything about the battery control module
Ask Your Own Mercedes Question
Customer reply replied 1 year ago

36,000 miles they saying it needs a new command unit Very little use 2 3 thousand miles a year

Mercedes Mechanic: Lou P. master tech, Mercedes Technician replied 1 year ago

ok, so , when you are not driving the car do you use a battery charger on the car? on either battery?

Ask Your Own Mercedes Question
Customer reply replied 1 year ago

NO I have put a trickle charger on before I replaced batteries and alternator but see no reason to have to

Mercedes Mechanic: Lou P. master tech, Mercedes Technician replied 1 year ago

ok, so when the car sits like yours does you at least need a charger on the rear main battery, the cars do not like to sit for more than a week with no starting and charging, if you are seeing the message on the dash that is because the main battery is draining when the car is not running. if it happens over night or 1-2 days then there is an excessive draw, if it only happens because the car sits for a few days or more then its normal to see that message. that is a function of the car. to avoid this you need to install a charger on the rear battery. the front battery is only used for starting the car. so there is no need for a charger on this one.

Ask Your Own Mercedes Question
Customer reply replied 1 year ago

This makes no sense to me this is a $100,000.00 auto I think there has to be another issue

Mercedes Mechanic: Lou P. master tech, Mercedes Technician replied 1 year ago

well, i would like a little faith here.

Ask Your Own Mercedes Question
Mercedes Mechanic: Lou P. master tech, Mercedes Technician replied 1 year ago

it doesnt matter how much the car costs, a battery will not last that long with it sitting . i am telling you this from 16 years experience.

Ask Your Own Mercedes Question
Mercedes Mechanic: Lou P. master tech, Mercedes Technician replied 1 year ago

you came here for help, i am giving you help that you need. there is a reason i asked the questions i asked about the car. cause it matters

Ask Your Own Mercedes Question
Mercedes Mechanic: Lou P. master tech, Mercedes Technician replied 1 year ago

the reason mercedes put 2 batteries in this model was because most customer store them, so when you go to start it the starter battery under the hood is what starts the car, then a module switches over to the rear main battery for the functions of the car and if the voltage is too low then the consumer offline message comes on the screen until the battery is fully charged, so in one sense its a normal operation in another sense it can be avoided if you add a charger to the main battery. this is not the first time i have dealt with this. i cannot force you to believe me so let me know your thoughts, i hate to think you would disregard my info .

Ask Your Own Mercedes Question
Ask Lou P. master tech Your Own Question
Lou P. master tech
Lou P. master tech
Lou P. master tech, Mercedes Technician
Category: Mercedes
Satisfied Customers: 5,083
5,083 Satisfied Customers
Experience: 15 years master certified 100% fix rate and have access to factory radio codes, wiring, and instructions.

Lou P. master tech is online now

A new question is answered every 9 seconds

How JustAnswer works:

  • Ask an ExpertExperts are full of valuable knowledge and are ready to help with any question. Credentials confirmed by a Fortune 500 verification firm.
  • Get a Professional AnswerVia email, text message, or notification as you wait on our site. Ask follow up questions if you need to.
  • 100% Satisfaction GuaranteeRate the answer you receive.

JustAnswer in the News:

Ask-a-doc Web sites: If you've got a quick question, you can try to get an answer from sites that say they have various specialists on hand to give quick answers... Justanswer.com.
JustAnswer.com...has seen a spike since October in legal questions from readers about layoffs, unemployment and severance.
Web sites like justanswer.com/legal
...leave nothing to chance.
Traffic on JustAnswer rose 14 percent...and had nearly 400,000 page views in 30 days...inquiries related to stress, high blood pressure, drinking and heart pain jumped 33 percent.
Tory Johnson, GMA Workplace Contributor, discusses work-from-home jobs, such as JustAnswer in which verified Experts answer people’s questions.
I will tell you that...the things you have to go through to be an Expert are quite rigorous.

What Customers are Saying:

I would (and have) recommend your site to others I was quite satisfied with the quality of the information received, the professional with whom I interacted, and the quick response time. Thanks, and be sure that I'll be back whenever I need a question answered in a hurry.

Stephanie PElm City, NC

used your service this weekend with "Trecers" help. thank you ,thank you, thank you. replaced an A/C fan motor. Local Auto Zone had part. $15.00 "tracer" fee and $40.00 for parts, I saved several hundreds of dollers at a shop. i will recommend you and use you in the future.

David L.Richmond, TX

9 dollars, 2 hours of my time, and I drove away. Your diagnosis was right on the mark. Thank you so much.

PhilMarysville, CA

Lurch. Thank you very much. I had real doubts about this website but your promptness of response, quick followup and to the point answer with picture was incredible.

CharlesWalnut Creek, CA

As a single woman, I really appreciate an excellent and affordable opinion.
Thank you Geordie, I will not hesitate to contact justanswer in the future!

SueCharleston, WV

Another great insight to what may be the problem. I will have my mechanic take a look at it tomorrow. Thanks again, Frank...you do indeed know your stuff.

JimCastleberry, FL

Wonderful service, prompt, efficient, and accurate. Couldn't have asked for more. I cannot thank you enough for your help.

Mary C.Freshfield, Liverpool, UK

< Previous | Next >

Meet the Experts:

MB Paul

MB Paul

Mercedes Technician

3,567 satisfied customers

Qualified Mercedes Benz Diagnostic Technician - 20+ years experience - Workshop Foreman for Mercedes

Marty

Marty

Mercedes Technician

28,773 satisfied customers

Bosch Certified Master Tech. Over 35 years experience.

Lou P. master tech

Lou P. master tech

Mercedes Technician

5,083 satisfied customers

15 years master certified 100% fix rate and have access to factory radio codes, wiring, and instructions.

Michael Warfield

Michael Warfield

Factory Mercedes-Benz Technician

3,131 satisfied customers

Mercedes-Benz Master Certified technician

Matt

Matt

Engineer

591 satisfied customers

Mechanical Engineer with 23 years experience in the auto industry, 8 yrs in formula 1 engine testing

promerc

promerc

mercedes diagnostic technician

553 satisfied customers

Qualified mercedes diagnostic technician & service team manager , ATA registered Master tech

Hipo64

Hipo64

Mercedes Technician

443 satisfied customers

Work and diagnose electronics on daily basis.

< Previous | Next >

Related Mercedes Questions
Battery dead can't unlock it. Can't get to the battery as
Battery dead can't unlock it JA: Did you test the battery with a voltmeter? And have you ever changed one before? Customer: Can't get to the battery as the car is locked JA: What is the model/year of … read more
Lou P. master tech
Lou P. master tech
Mercedes Technician
5,083 satisfied customers
The blue wire in the back of the alternator has no power
the blue wire in the back of the alternator has no power when the key in switched on,after replacing the battery in 2003 benz s430 4matic so the alternator is not chargong … read more
Lou P. master tech
Lou P. master tech
Mercedes Technician
5,083 satisfied customers
I burn the alternator fuse. Its reading 12 volts. C230
i made a rookie mistake b4 i took of the old alternator i got a spark when taking of battery cable… read more
Matt
Matt
Engineer
Bachelor's Degree
591 satisfied customers
2003 ML350. Replaced alternator and battery. Now car starts
2003 ML350. Replaced alternator and battery. Now car starts but stalls and can't be driven. I've read that it might be a key recognition problem. What are my options. I don't have another key now. Tha… read more
Marty
Marty
Mercedes Technician
Associate Degree
28,773 satisfied customers
2003 Mercedes E320 Serious battery drain. Battery is
2003 Mercedes E320 Serious battery drain. Battery is draining within in hours after being fully charged.… read more
Chad Farhat
Chad Farhat
Owner
Associate Degree
4,017 satisfied customers
Regarding that Mercedes --I didn't mention that the battery
Regarding that Mercedes --I didn't mention that the battery was completely flat and we had to jump the car to get her on her way but my wife only made it about 2 miles before the car shut off. Have no… read more
Marty
Marty
Mercedes Technician
Associate Degree
28,773 satisfied customers
I changed both batteries and alternator and when I start
I changed both batteries and alternator and when I start car, it will not shift out of gear, radiator fan does not work, right headlight will not come on, and the code : "reduced braking power" shows.… read more
Lou P. master tech
Lou P. master tech
Mercedes Technician
5,083 satisfied customers
1987 300SDL alternator (original) bearing was making very
1987 300SDL alternator (original) bearing was making very loud noises. I replaced it with a new one (not reman) and fully charged the battery before driving. 30 minutes into the drive, most dash light… read more
Marty
Marty
Mercedes Technician
Associate Degree
28,773 satisfied customers
Lou my alternator has label some numbers and it says"
Lou my alternator has label some numbers and it says " Remanufactured" does that means that its not original alternator from the factory?… read more
Lou P. master tech
Lou P. master tech
Mercedes Technician
5,083 satisfied customers
Dead battery. Unable to open trunk to get to the battery for
Dead battery. Unable to open trunk to get to the battery for jump start … read more
Matt
Matt
Engineer
Bachelor's Degree
591 satisfied customers
I am having a problem with either my battery or alternator.
I am having a problem with either my battery or alternator. 2005 Mercedes e320 base model gas. … read more
Lou P. master tech
Lou P. master tech
Mercedes Technician
5,083 satisfied customers
A warning light just came on that said "Alternative battery
A warning light just came on that said "Alternative battery malfunction". … read more
Eurocar Inc
Eurocar Inc
Master Audi/VW Tech
Associate Degree
1,773 satisfied customers
My alternator is not charging the battery although the
My alternator is not charging the battery although the alternator is test that it is good. … read more
Pete
Pete
Independent Auto Technician
Vocational, Technical or Trade Scho
138 satisfied customers
Got water i think in alternator while cleaning battery light
got water i think in alternator while cleaning battery light on also gauges don't work and turn signals as well … read more
Shawn Few
Shawn Few
AS
64 satisfied customers
03 clk320 will turn over but not fire, Alternator, battery,
Alternator, battery, and crank sensor already replaced … read more
Lou P. master tech
Lou P. master tech
Mercedes Technician
5,083 satisfied customers
It lit up a warning light that says: "Alternate battery Low"
It lit up a warning light that says: "Alternate battery Low" … read more
Lou P. master tech
Lou P. master tech
Mercedes Technician
5,083 satisfied customers
Malfunction light on Battery/alternator visit work shop and
Malfunction light on Battery/alternator visit work shop and also Under Voltage Switch consumer off… read more
Lou P. master tech
Lou P. master tech
Mercedes Technician
5,083 satisfied customers
Battery drain. Replaced the alternator, too. 2010 E350. I
I have not. I had a local MB repair shop replace the alternator. I have an appt on Monday with Mercedes Benz South Charlotte … read more
rpmdiag
rpmdiag
High school
7,117 satisfied customers
Disclaimer: Information in questions, answers, and other posts on this site ("Posts") comes from individual users, not JustAnswer; JustAnswer is not responsible for Posts. Posts are for general information, are not intended to substitute for informed professional advice (medical, legal, veterinary, financial, etc.), or to establish a professional-client relationship. The site and services are provided "as is" with no warranty or representations by JustAnswer regarding the qualifications of Experts. To see what credentials have been verified by a third-party service, please click on the "Verified" symbol in some Experts' profiles. JustAnswer is not intended or designed for EMERGENCY questions which should be directed immediately by telephone or in-person to qualified professionals.

Disclaimer: Information in questions, answers, and other posts on this site ("Posts") comes from individual users, not JustAnswer; JustAnswer is not responsible for Posts. Posts are for general information, are not intended to substitute for informed professional advice (medical, legal, veterinary, financial, etc.), or to establish a professional-client relationship. The site and services are provided "as is" with no warranty or representations by JustAnswer regarding the qualifications of Experts. To see what credentials have been verified by a third-party service, please click on the "Verified" symbol in some Experts' profiles. JustAnswer is not intended or designed for EMERGENCY questions which should be directed immediately by telephone or in-person to qualified professionals.

Show MoreShow Less

Ask Your Question

x