Mercedes

Have Mercedes questions? Ask a mechanic for answers ASAP

Ask an Expert,
Get an Answer ASAP!

I left back car window half way down when it rained and back…

Customer Question
Second opinion] I left...

Second opinion] I left back car window half way down when it rained and back left passenger side floor got wet. Car started well on getting in it the next day. Got to my destination and wouldn't start. I have a 2009 C300 Mercedes. Before the wrecker pulled it on the truck it started twice. Cut it off and wouldn't start back. Had it pulled to the dealer. The water on just on carpet of back passenger side. It said on panel SRS malfunction. What do you think could be the problem?

Mechanic's Assistant: Have you checked the battery, particularly the terminal connections? Are they corroded?

No....Just got new battery in August. I just don't want them to charge me more than it really is to get repaired.

Mechanic's Assistant: Are you fixing your C300 yourself? What have you tried so far?

No..... right now it is at the dealers and my service man says it might be electrical. They suppose to get back with me.

Mechanic's Assistant: Anything else you want the mechanic to know before I connect you?

That's pretty much it.

Submitted: 4 months ago.Category: Mercedes
Show More
Show Less
Ask Your Own Mercedes Question
Answered in 4 hours by:
12/27/2017
Mercedes Mechanic: Matt, Engineer replied 4 months ago
Matt
Matt, Engineer
Category: Mercedes
Satisfied Customers: 23,078
Experience: Mechanical Engineer with 23 years experience in the auto industry, 8 yrs in formula 1 engine testing
Verified

Hello and welcome to Just Answer

This sounds like the body control module on the car has gotten wet as its located under the passenger seat ?

often when water makes its way inside it will sit under the carpet and not be immediately visible

so I'd suggest the next step is to lift up the floor mats and dry them out, and also lift as much of the rear carpet as possible to get under it with some rags / sponges etc to remove the water

then disconnect the battery and then disconnect the BCM and use contact cleaner on the connectors to remove any residue

there may also be a front junction box under the front passenger footwell carpet do the same to that as water can sometimes run under the carpet to the front of the car

Ask Your Own Mercedes Question
Mercedes Mechanic: Matt, Engineer replied 4 months ago

Hi
do you still need help?
Bear in mind that the site takes a deposit from you at the beginning and this is held by the site until you rate my answer at which point the cash is split between the site and the expert. I am only paid for my work on this question if you rate my answer, using the star system at the top of the screen. Please do not forget! If you're not pleased, also let me know because rating bad does not result in a refund, there are better options. Rating now will not close this post nor prevent further replies
Thanks Matt

Ask Your Own Mercedes Question
Was this answer helpful?
Ask Matt Your Own Question
Matt
Matt
Matt, Engineer
Category: Mercedes
Satisfied Customers: 23,078
23,078 Satisfied Customers
Experience: Mechanical Engineer with 23 years experience in the auto industry, 8 yrs in formula 1 engine testing

Matt 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

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

23,078 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
No audio on the radio of Benz C300
No sound on my radio, Benz C300… read more
Michael Warfield
Michael Warfield
Factory Mercedes-Benz Technician
Vocational, Technical or Trade Scho
3,131 satisfied customers
Mercedes-Benz C300 4Matic Sport: I have locked my keys in my
I have locked my keys in my trunk of my Mercedes C300 and I'm three hours from home. What would you suggest? AAA helped me open the doors but the alarm system is preventing me from opening the trunk. … read more
Michael Warfield
Michael Warfield
Factory Mercedes-Benz Technician
Vocational, Technical or Trade Scho
3,131 satisfied customers
C300 2015, auxiliary battery malfunction, how can I order
C300 2015, auxiliary battery malfunction, how can I order one or where is located? Thank you … read more
Wolfgang
Wolfgang
7 satisfied customers
It will not start. Not the battery. 2015 C300. I checked the
yes I want to know if there is a way to take of th safe mode… read more
Lou P. master tech
Lou P. master tech
Mercedes Technician
Bachelor's Degree
3,771 satisfied customers
My C300 says key being initialised Please wait... i have
Hi My C300 says key being initialised Please wait... i have waited for hours, any ideas on what is happening...? I have changed the battery keys. … read more
eric remington
eric remington
FORMER SHOP OWNER/TECHNICIAN/INSPECTOR
associates degree
558 satisfied customers
2011 C300. Smokes at start. 83000, recently serviced. This
2011 C300. Smokes at start JA: How many miles are on the car? Have you been losing oil or coolant? Customer: 83000, recently serviced JA: Are you fixing your C300 yourself? What have you tried so far?… read more
Pete
Pete
Independent Auto Technician
Vocational, Technical or Trade Scho
138 satisfied customers
I recently bought a 2015 C300 and the Multimedia system
I recently bought a 2015 C300 and the Multimedia system (Navigation, Radio, etc). is not working. The dealership (not an MB dealership) said they spoke to a Benz dealership and apparently there is a p… read more
Lou P. master tech
Lou P. master tech
Mercedes Technician
Bachelor's Degree
3,771 satisfied customers
Getting device not available on command center. C300 2015.
getting device not available on command center JA: What is the model/year of your Mercedes? Customer: c300 2015 JA: Are you fixing your C300 yourself? What have you tried so far? Customer: turning the… read more
Pete
Pete
Independent Auto Technician
Vocational, Technical or Trade Scho
138 satisfied customers
I have a 2011 c300, not starting. Not the battery starter or
Hello. I have a 2011 c300, not starting. Not the battery starter or alternator (according to O'Reilly's Auto Parts). Everything inside still comes on except the horn. When the key is removed there's a… read more
Lou P. master tech
Lou P. master tech
Mercedes Technician
Bachelor's Degree
3,771 satisfied customers
Have a 2011 C300, drove it in the garage turned it off.
Have a 2011 C300, drove it in the garage turned it off. After about an hour went back out and it wouldn't start. All of the lights on the dash register, i.e. fuel gauge, temperature, but will not cran… read more
BOBBYSS
BOBBYSS
TECHNICIAN/ADVISOR
Associate Degree
8,343 satisfied customers
How to charge a dead battery on a C300. No light come on.
Yes, I just opened the hood. I have a battery charger. … read more
Pete
Pete
Independent Auto Technician
Vocational, Technical or Trade Scho
138 satisfied customers
Battery location on my C300 2014 auxiliary battery. I I
battery location on my C300 2014 auxiliary battery … read more
Wolfgang
Wolfgang
7 satisfied customers
C 300: My 2008 C300 blower fans are not working even though
My 2008 C300 blower fans are not working even though the control panel lights are working. Could this be a fuse? if so, which one?… read more
Marty
Marty
Mercedes Technician
Associate Degree
29,009 satisfied customers
2008 mercedes: key fob didnt unlock doors used..wouldnt start
2008 mercedes c300. key fob didnt unlock doors used key in end of FOB. alarm went off car wouldnt start . after about 30 minutes the car reset itself and off I went? is this normal?… read more
Pete
Pete
Independent Auto Technician
Vocational, Technical or Trade Scho
138 satisfied customers
C300: my battery went dead on my mercedes c300 - i got a jump,
my battery went dead on my mercedes c300 - i got a jump, the car alarm went off and now, though the vehicle is running fine , my cd player will not read any cds - it keeps saying 'disc unreadable' eve… read more
Marty
Marty
Mercedes Technician
Associate Degree
29,009 satisfied customers
Mercedes C300: I just bought a 2008 Mercedes C300 4Matic and
I just bought a 2008 Mercedes C300 4Matic and my hazard warning lights are not working - when pressing the switch there is no action. At this point I am suspecting the fuse and the relay. I managed to… read more
Marty
Marty
Mercedes Technician
Associate Degree
29,009 satisfied customers
Trying to find secondary air pump fuse and relay on Mercedes
Trying to find secondary air pump fuse and relay on Mercedes c300 sports … read more
Lou P. master tech
Lou P. master tech
Mercedes Technician
Bachelor's Degree
3,771 satisfied customers
c300 4matic: my 2009 c300 4matic wont start. THe ignition recognizes
my 2009 c300 4matic wont start. THe ignition recognizes the key but does not engage the key and you don't hear that sound like you ususally do. when you turn the key you get nothing… read more
Michael Warfield
Michael Warfield
Factory Mercedes-Benz Technician
Vocational, Technical or Trade Scho
3,131 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