Mercedes

Have Mercedes questions? Ask a mechanic for answers ASAP

Ask an Expert,
Get an Answer ASAP!

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: 7 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 7 months ago
Marty
Marty, Mercedes Technician
Category: Mercedes
Satisfied Customers: 55,218
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
Was this answer helpful?

How JustAnswer works

step-image
Describe your issueThe assistant will guide you
step-image
Chat 1:1 with a mercedes mechanicLicensed Experts are available 24/7
step-image
100% satisfaction guaranteeGet all the answers you need
Ask Marty Your Own Question
Marty
Marty
Marty, Mercedes Technician
Category: Mercedes
Satisfied Customers: 55,218
55,218 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

55,218 satisfied customers

Bosch Certified Master Tech. Over 35 years experience.

Lou P. master tech

Lou P. master tech

Mercedes Technician

4,460 satisfied customers

20 years Master Certified excellent fix rate and have access to factory wiring, and instructions.

Michael Warfield

Michael Warfield

Factory Mercedes-Benz Technician

3,132 satisfied customers

Mercedes-Benz Master Certified technician

Matt

Matt

Engineer

643 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
Battery is dead when I try to crank it the car alarm sounds.
battery is dead when I try to crank it the car alarm sounds … read more
Marty
Marty
Mercedes Technician
Associate Degree
55,218 satisfied customers
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
Bachelor's Degree
4,460 satisfied customers
My battery is dead and I can't open the trunk. I also looked
My battery is dead and I can't open the trunk. I also looked for the jump terminal at the front of the car, but I can't find it. I have a 1998 Mercedes SL500 … read more
Eric
Eric
Retired
N/A
14,436 satisfied customers
My warning light is coming on in my 2003 SL500 after putting
My warning light is coming on in my 2003 SL500 after putting full charge on- … read more
TIM MOHR
TIM MOHR
SHOP OWNER
Master's Degree
8,037 satisfied customers
I HAVE CHANGED TH REAR BATTERY ON MY SL500. HOW DO I RESET
I HAVE CHANGED TH REAR BATTERY ON MY SL500. HOW DO I RESET THE COMPUTERS? … read more
Lou P. master tech
Lou P. master tech
Mercedes Technician
Bachelor's Degree
4,460 satisfied customers
I have a 2003 Mercedes SL500 and when I go somewhere and cut
I have a 2003 Mercedes SL500 and when I go somewhere and cut my car off it will not start back up right away, it has to sit for 20 to 30 min. before it start back up. I've changed the alternator regul… read more
supermechanic
supermechanic
Service consultant
Vocational, Technical or Trade Scho
10 satisfied customers
I have a 2003 Mercedes SL 500 that is completely dead. I did
I have a 2003 Mercedes SL 500 that is completely dead. I did not use the car in 4 months and did not have a trickle charger hooked up. Is it OK to jump the front battery? The front battery is 4yr. & 7… read more
Marty
Marty
Mercedes Technician
Associate Degree
55,218 satisfied customers
SL500: My 03 SL500 won't start after sitting a couple of days.
My 03 SL500 won't start after sitting a couple of days. When I turn the key the electronics all come on, but the car won't start until I try several times. The problem does not happen when the car has… read more
Lou P. master tech
Lou P. master tech
Mercedes Technician
Bachelor's Degree
4,460 satisfied customers
Sl500: Have sl500 battry light on, brake/ altinator do not
Have sl500 battry light on, brake/ altinator do not drive light on. Started car and it's running fine, do I have to take it to the dealer or is the a reset to clear codes. Car has been sitting for mon… read more
Marty
Marty
Mercedes Technician
Associate Degree
55,218 satisfied customers
500sl: Sl500 my car is stone dead no lights nothing.I cant
Sl500 my car is stone dead no lights nothing.I can't open trunk to check battery how to open by hand… read more
Matt
Matt
Engineer
Bachelor's Degree
643 satisfied customers
MERCEDES BENZ: DASH BOARD SCREEN IT SHOWS..WORKSHOP..MALFUNCTION
HOW DO YOU RESET THE COMPUTER AFTER INSTALLING AN ASSESSORY BATTERY IN A SL500 MERCEDES BENZ WITHOUT TAKING IT IN TO THE MERCEDES SERVICE. ON THE DASH BOARD SCREEN IT SHOWS AN EMBLEM OF A BATTERY IN R… read more
Marty
Marty
Mercedes Technician
Associate Degree
55,218 satisfied customers
2003 SL500: my driveway..new key from the dealer and picked it up.
I lost the key to my 2003 SL500 and it sat for about 5 months in my driveway. I ordered a new key from the dealer and picked it up.. The battery in the car is dead. I am trying to jump start it but it… read more
Marty
Marty
Mercedes Technician
Associate Degree
55,218 satisfied customers
2003 e320: malfunction on board..electrical..disconnect..charger
i have a malfunction on board on a 2003 e320 says electrical consumer turned off with the battery sign what could it be . can i disconnect batterie rear and place it on a charger… read more
Anthony
Anthony
Master Automobile Technician
Vocational, Technical or Trade Scho
11,778 satisfied customers
SL..wont start..the lower right front of the engine compartment
I have a 2003 SL 500 with 22,500 miles on it, and today I won't start. I have not started the car in about a month and a half. I only get a loud click from what I think is the lower right front of the… read more
AudiDoc
AudiDoc
Owner
Bachelor\u0027s Degree
1,591 satisfied customers
2003 sl500: the car is on and sitting in park It goes
I just bought a 2003 sl500 , when the car is on and sitting in park It goes up and then down over and over again. No matter what height position the ABC is in.… read more
Michael Warfield
Michael Warfield
Factory Mercedes-Benz Technician
Vocational, Technical or Trade Scho
3,132 satisfied customers
2003 sl500: the winter in a heated warehouse..batterys..trunk
i'm planing on storing my 2003 sl500 for the winter in a heated warehouse. sl500 have 2 batterys one in the front and one in the trunk.now where should i install the battery maintainer? front or back?… read more
Marty
Marty
Mercedes Technician
Associate Degree
55,218 satisfied customers
My 2004 has 25,000 miles, and sits for 2-3 weeks..le..charger
My 2004 has 25,000 miles, and sits for 2-3 weeks at a time on occaision. I have le the supply battery run down 3 times, and it has always come back with a 10 amp charger. I tried to start the car and … read more
Victor MB
Victor MB
Vocational, Technical or Trade Scho
204 satisfied customers
88 420SEL: keeps dying..I just had it recharged, but I think there
The battery is apparently not being re-charged and keeps dying on my '88 420SEL . I replaced the battery about 2 months ago and already the new battery is dead. I just had it recharged, but I think th… read more
John
John
Vocational, Technical or Trade Scho
1,209 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