Mercedes

Have Mercedes Questions? Ask a Mechanic for Answers ASAP

Ask an Expert,
Get an Answer ASAP!

Mercedes

Dead which battery do I charge? front or back how will it…

Customer Question
Dead which battery do...

Dead which battery do I charge? front or back how long will it take to recharge its been sitting for 3 months

Mechanic's Assistant: Did you test the battery with a voltmeter? And have you ever changed one before?

Yes its been changed

Mechanic's Assistant: What is the make/model/year of your car?

2003 sl500

Mechanic's Assistant: Are you fixing your SL500 yourself? What have you tried so far?

To charge rear battery which one is the proper one to charge I know one is for accessories and one for engine

Submitted: 2 months ago.Category: Mercedes
Show More
Show Less
Ask Your Own Mercedes Question
Answered in 3 minutes by:
12/21/2017
Mercedes Mechanic: Marty, Mercedes Technician replied 2 months ago
Marty
Marty, Mercedes Technician
Category: Mercedes
Satisfied Customers: 54,743
Experience: Bosch Certified Master Tech. Over 35 years experience.
Verified

Hi, my name is***** batteries will need to be charged for all accessories to work but you should be able to start the car by jumping or charging the battery under the hood. The rear battery is for the accessories.

Let me know if you need anything else.

Ask Your Own Mercedes Question
Ask Marty Your Own Question
Marty
Marty
Marty, Mercedes Technician
Category: Mercedes
Satisfied Customers: 54,743
54,743 Satisfied Customers
Experience: Bosch Certified Master Tech. Over 35 years experience.

Marty 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

54,743 satisfied customers

Bosch Certified Master Tech. Over 35 years experience.

Lou P. master tech

Lou P. master tech

Mercedes Technician

3,771 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

602 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

444 satisfied customers

Work and diagnose electronics on daily basis.

< Previous | Next >

Related Mercedes Questions
2006 SL500, trunk won't open with either the key fob or the
2006 SL500, trunk won't open with either the key fob or the switch in the drivers door but will open with the mechanical key. Top will not go down, it says the divider is not closed but it is. There i… read more
Lou P. master tech
Lou P. master tech
Mercedes Technician
Bachelor's Degree
3,771 satisfied customers
2003 MB SL500 Convertible Took it out of storage for the
2003 MB SL500 Convertible Took it out of storage for the winter started right up but says Electric Consumers Off Line and Top will not go down ??? … read more
Marty
Marty
Mercedes Technician
54,743 satisfied customers
Stop car to low? 2006 sl500. Car in storage.just started and
stop car to low? JA: What is the model/year of your Mercedes? Customer: 2006 sl500 JA: Are you fixing your SL500 yourself? What have you tried so far? Customer: car in storage.just started and warning… read more
Marty
Marty
Mercedes Technician
54,743 satisfied customers
I recently bought a 2005 sl500 and found out that there is
I recently bought a 2005 sl500 and found out that there is an owner I was not told about which stopped the mileage from 2010 to 2015 is there any other information I can get to prove this besides the … read more
Dan
Dan
Dealership Technician
Associate Degree
1,861 satisfied customers
MY 98 SL500 has been sitting for 3 months dead battery i
MY 98 SL500 has been sitting for 3 months dead battery i first did a quick charge and it started right up but when i got home the charge didnt last ( the battery is new ) 4 months old .. in any event … read more
Marty
Marty
Mercedes Technician
54,743 satisfied customers
I have a 1999 sl500 with hate top or convertiblele, my
I have a 1999 sl500 with hate top or convertiblele, my driver side window will not go down slightly to open & close the door like it did. Can I fix this? … read more
Wolfgang
Wolfgang
1 satisfied customers
I have a 1992 Mercedes sl500 and the convertible top is not
I have a 1992 Mercedes sl500 and the convertible top is not working correctly … read more
Marty
Marty
Mercedes Technician
54,743 satisfied customers
We have a 1992 SL500 we took the rear section of the soft
we have a 1992 SL500 we took the rear section of the soft top out to replace the cracked isinglass. Completed the repair put it back together and the top doesn't function. The rear half of the folding… read more
Lou P. master tech
Lou P. master tech
Mercedes Technician
Bachelor's Degree
3,771 satisfied customers
My trunk on my SL500 is open and will not close. Also the
my trunk on my SL500 is open and will not close. Also the Convertiable top is down. … read more
Danny
Danny
Owner, lead mechanic
High School or GED
3,963 satisfied customers
1998 SL500, key fobs suddenly won't lock/unlock the car.
1998 SL500, key fobs suddenly won't lock/unlock the car. Changed batteries, no help. Locks, etc., work just fine manually. … read more
Marty
Marty
Mercedes Technician
54,743 satisfied customers
Srs light is on. 2003 sl500. I had a trickle charge on the
srs light is on JA: Is anything interfering with the seatbelt latch? Customer: no JA: What is the model/year of your Mercedes? Customer: 2003 sl500 JA: Are you fixing your SL500 yourself? What have yo… read more
Pete
Pete
Independent Auto Technician
Vocational, Technical or Trade Scho
138 satisfied customers
My mechanic feels we need to replace our 1995 SL500 Engine
My mechanic feels we need to replace our 1995 SL500 Engine control module. The part in our car is(###) ###-####and i sent away for a used part and was sent a different part,(###) ###-####which also wa… read more
Marty
Marty
Mercedes Technician
54,743 satisfied customers
I want to disable my alarm in my 1997 sl500. & yes. I
I want to disable my alarm in my 1997 sl500 JA: Have you checked the fuses? Is your battery fully charged? Customer: yes & yes JA: Are you fixing your SL500 yourself? What have you tried so far? Custo… read more
Marty
Marty
Mercedes Technician
54,743 satisfied customers
2003 SL500, top will not go up, as soon as I pull the lever
2003 SL500, top will not go up, as soon as I pull the lever the dash says visit workshop … read more
Lou P. master tech
Lou P. master tech
Mercedes Technician
Bachelor's Degree
3,771 satisfied customers
Looking for location of abc control unit. 2003 sl500.
looking for location of abc control unit. 2003 sl500. wdb2304752F086201 … read more
Lou P. master tech
Lou P. master tech
Mercedes Technician
Bachelor's Degree
3,771 satisfied customers
My 2003 sl500 is having problems with the horn in that when
hi. my 2003 sl500 is having problems with the horn in that when it is honked it does not go off unless I shut off the ignition. I picked up a horn relay but cannot figure out if it is the correct one … read more
eauto
eauto
self employed
High School or GED
74 satisfied customers
The car will not unlock. 2004 sl500. Calling my husband ha
the car sat on a trickle charge for the summer but we have been driving it on the highway this week to fully charge the battery… read more
Marty
Marty
Mercedes Technician
54,743 satisfied customers
I HAVE A 1997 SL500 THAT IS IMMACULATE. HOWEVER, AFTER
HOWEVER, AFTER HAVING A NEW BATTERY INSTALLED AND MAJOR CHECKUP ON ALL SYSTEMS WHICH TURNED OUT GREAT AT THE DEALER, AND LETTING THE VEHICLE SIT IN MY GARAGE FOR 4 MONTHS, IT WOULDN'T EVEN CRANK, SO I CHARGED THE BATTERY OVER A FEW DAYS WITH THE CHARGER: C TEC (SPELLING). BUT NOTHING BE SILENCE AND THE BATTERY CHECKS OUT STRONG. HAD THE STARTER CHECKED, AND IT IS FINE? SO NOT SURE THE SOURCE OF THE ISSUE. … read more
AMEDEE
AMEDEE
AUTOMOTIVE TECHNICIAN
Vocational, Technical or Trade Scho
9,105 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