Mercedes

Have Mercedes questions? Ask a mechanic for answers ASAP

Ask an Expert,
Get an Answer ASAP!

Second opinion] On a 2003 E500 parked in garage normally.

Customer Question
Second opinion] On a...

Second opinion] On a 2003 E500 parked in garage normally. Next day everything was shut down. Had to open the trunk with blade key. No interior lights at all. Ignition key would not turn. Roadside service jumped the car using the main battery in the trunk. Rode around for about 20 minutes to presumably recharge. After 2 days went to try it again and once more same result as before. Tried charging the battery with a Battery Tender device and after 2 days gave up. Voltage while hooked up was 3.78 volts. Voltage with battery Tender disconnected was 3.44 volts. Hope you can help.

Mechanic's Assistant: Have you checked the vehicle's manual for this?

Yes, but so far nothing relevant found. For multiple years when first turned on I would occasionally get the message "...Electrical consumers switched off". This would disappear as I began driving.

Mechanic's Assistant: Are you fixing your E500 yourself? What have you tried so far?

Beyond using the Battery Tender I haven't tried. New batteries were installed about 18 months ago when the car had about 70,000 miles on it. It now has 92,000 miles. My normal mechanic is tied up for a while and the nearest dealer is about 65 miles away. Due to age and recent surgery, I am limited physically with I can try.

Submitted: 8 months ago.Category: Mercedes
Show More
Show Less
Ask Your Own Mercedes Question
Answered in 14 minutes by:
9/18/2017
Mercedes Mechanic: Lou P. master tech, Mercedes Technician replied 8 months ago
Lou P. master tech
Lou P. master tech, Mercedes Technician
Category: Mercedes
Satisfied Customers: 5,894
Experience: 20 years Master Certified excellent fix rate and have access to factory 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 8 months ago

What needs to happen is you need to do whats called a "quiescent draw test" do you know what this is and are you going to attempt to fix yourself? This requires extensive knowledge with automotive electronics. So let me know your capabilities and I'll be able to advise on the best course of action. seeing as how you mentioned a mechanic I can assume you wont be doing the work yourself,

but the issue will be one of two causes

1- alternator is no good

2- battery is no good or there is an excessive draw on the car that is killing the battery

Please take a second and click the stars at the top of the screen to rate my service so i may receive my credit , 5 stars is ideal , please request me in the future.Keep in mind that when you rate it does not end our conversation, you can still return here to me for follow up information if needed just simply reply back, thanks!
Lou P.
Master Mercedes-Benz Technician
Master ASE Certified

Ask Your Own Mercedes Question
Was this answer helpful?
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: 5,894
5,894 Satisfied Customers
Experience: 20 years Master Certified excellent fix rate and have access to factory 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

29,009 satisfied customers

Bosch Certified Master Tech. Over 35 years experience.

Lou P. master tech

Lou P. master tech

Mercedes Technician

5,894 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

3,131 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 E350: Mercedes..4matic..the battery light on the dash..workshop
I have a 2006 E350 Mercedes 4matic. I was away for 5 days and upon return the battery light on the dash went on also reading (visit workshop. The manual said to check the vtec(?) belt to see it is was… read more
MB Paul
MB Paul
Mercedes Technician
Vocational, Technical or Trade Scho
3,567 satisfied customers
Mercedes red battery light is on saying visit workshop
I have a E240 and just changed the small battery and now the battery warning comes on.......saying please visit workshop....the garage told me this is nothing to worry about. However very annoying on … read more
MB Paul
MB Paul
Mercedes Technician
Vocational, Technical or Trade Scho
3,567 satisfied customers
Can't start my cla. without changing gear, consult workshop
can't start my cla. without changing gear, consult workshop message. … read more
Lou P. master tech
Lou P. master tech
Mercedes Technician
5,894 satisfied customers
I put a brand new battery and alternator in my 95 Mercedes s
I put a brand new battery and alternator in my 95 Mercedes s 500 but still not keeping charges… read more
Lou P. master tech
Lou P. master tech
Mercedes Technician
5,894 satisfied customers
Battery, ABS, etc are coming on after changing the battery
Battery, ABS, etc are coming on after changing the battery and aux battery … read more
Lou P. master tech
Lou P. master tech
Mercedes Technician
5,894 satisfied customers
2002 Mercedes C320 new battery and alternator. Key will not
Second opinion] 2002 Mercedes C320 new battery and alternator. Key will not turn … read more
Marty
Marty
Mercedes Technician
Associate Degree
29,009 satisfied customers
I have a 2002 S430 i just put new battery and alternator and
I have a 2002 S430 i just put new battery and alternator and still not charging. … read more
Marty
Marty
Mercedes Technician
Associate Degree
29,009 satisfied customers
E320 1998 Battery indicator on dash on. pulled alternator
E320 1998 Battery indicator on dash on. pulled alternator and tested good. Battery test good. Lamp stays on. If idles for ahwile valtage drops. Car dies. Put in aftermarket alternator same problems.… read more
Chad Farhat
Chad Farhat
Owner
Associate Degree
5,165 satisfied customers
Started the E350 today and "Alternate Battery Malfunction"
Started the E350 today and "Alternate Battery Malfunction" in yellow came on. What is happening? … read more
Chad Farhat
Chad Farhat
Owner
Associate Degree
5,165 satisfied customers
Replace both batteries replace the alternator battery still
Replace both batteries replace the alternator battery still not charging 2008 Mercedes S550 4matic … read more
Lou P. master tech
Lou P. master tech
Mercedes Technician
5,894 satisfied customers
2009 ML 63 not charging battery, have check alternator on
2009 ML 63 not charging battery, have check alternator on the bench and works ok. i have also put jumper leads for my other car and battery charges and battery meter in car shows good. I have looped t… read more
Chad Farhat
Chad Farhat
Owner
Associate Degree
5,165 satisfied customers
I have a 2006 mercedes s430. new alternator, new battery and
I have a 2006 mercedes s430. new alternator, new battery and fuses under passenger floor checked ok---still no charge … read more
Wolfgang
Wolfgang
7 satisfied customers
Mercedes ml320 CDI: charge battery..alternator..jump started
Merscdes ML320 CDI wont charge battery. alternator is putting out 14v but not getting to battery. Car was jump started. Is there an inline fuse to battery?… read more
Marty
Marty
Mercedes Technician
Associate Degree
29,009 satisfied customers
Hello I have a problem with the power steering of my A class
Hello I have a problem with the power steering of my A class, its gets stiff most of the time, but sometimes it is fine? is this an issue with the pump?… read more
MB Paul
MB Paul
Mercedes Technician
Vocational, Technical or Trade Scho
3,567 satisfied customers
Convenience functions temporarily unavailable. This happens
Convenience functions temporarily unavailable. This happens to me all the time. Sometimes the car actually stops working properly. The radio, windows etc will not work properly. I have taken it to the… read more
Nelson Garcia
Nelson Garcia
Vocational, Technical or Trade Scho
1,092 satisfied customers
What should I do with this message restraint SRS visit
What should I do with this message restraint SRS visit workshop?thanks… read more
Marty
Marty
Mercedes Technician
Associate Degree
29,009 satisfied customers
Mercedes-Benz E320: Malfunction electrical consumers switched.
Malfunction electrical consumers switched. Off… read more
Marty
Marty
Mercedes Technician
Associate Degree
29,009 satisfied customers
Mercedes-Benz CLS 550: is there a battery jump point under
is there a battery jump point under the hood of my 2008 mercedes CLS 550… read more
Marty
Marty
Mercedes Technician
Associate Degree
29,009 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