Mercedes

Have Mercedes questions? Ask a mechanic for answers ASAP

Ask an Expert,
Get an Answer ASAP!

Pete Iv'e been waking up to a dead battery that's only 4…

Customer Question
good evening Pete Iv'e been...
good evening Pete Iv'e been waking up to a dead battery that's only 4 mths old & I checked the alternater it's alive and kicking.
After closer inspection I realized over time the PSE module kicking on and off while it's parked in the garage but please note* the trunk does not seat correctly as there is a 1/4" gap it seems on one side of the trunk when engaged(the soft close assist is not working) , I had to epoxy the trunk latch for leaks it seems to work when I engage the key fob. but when the trunk is engaged and I press the fob I have to push down on the trunk to get it to release..but I'm wondering where the PSE comes in??....I leave it closed and locked which brings up the fact that when I press the fob to lock the car the lights start to flash and I press the fob again to get them to stop what is going on????
Submitted: 2 years ago.Category: Mercedes
Show More
Show Less
Ask Your Own Mercedes Question
Answered in 8 hours by:
2/25/2016
Mercedes Mechanic: Lou P. master tech, Mercedes Technician replied 2 years ago
Lou P. master tech
Lou P. master tech, Mercedes Technician
Category: Mercedes
Satisfied Customers: 5,901
Experience: 20 years Master Certified excellent fix rate and have access to factory wiring, and instructions.
Verified

Hello my name is ***** ***** am a professional here at justanswer and i noticed your question has not been answered yet. I

hope i can still assist with your issue. Keep in mind i cannot see , touch, or hear what you may be experiencing but i

have the automotive knowledge to assist you in the right direction.

It sounds to me like the trunk may not be pulling down all the way and if the pse loses pressure or vacuum it will continue to cycle until it achieves it or until a fault code is set then it will not function the affected circuit. so the first thing i need to know is can you open the trunk and manually press the latch in to close it and watch it close and listen for air escaping, i understand you epoxied a few things but the element pod can still leak air. this may be a hard one to solve over the net but i will do my best to help you. Lou P

Ask Your Own Mercedes Question
Mercedes Mechanic: Lou P. master tech, Mercedes Technician replied 2 years ago

Here is the rest of the documents., again i hope this helps, Lou P.

Please take a second and click the stars at the top of the screen to rate me so i may recieve my credit , 5 stars is

ideal , please request me in the future. If you feel I have not been helpful please DO NOT RATE 1 or 2 stars AND WASTE

YOUR MONEY , I will opt out to see if another expert can provide more or better assistance so you're not wasting your

money!!. Thanks for choosing just answer. Also , if you feel i deserve one , BONUSES are GREATLY APPRECIATED ! Lou P.

Keep in mind then when you rate it does not end our conversation. you can still return here to me for follow up

information if needed, Lou P.

Ask Your Own Mercedes Question
Customer reply replied 2 years ago

hi lou I got your message and the answer is I can close it and it will latch but it will not lower itself after that.

when I open the trunk and lock the latch manually and press the key it will release.

The attachement I received was for a fuel pump removal????

Mercedes Mechanic: Lou P. master tech, Mercedes Technician replied 2 years ago

wow, sorry about that, i dont know how i uploaded to you obviously ignore that. sorry.

Ask Your Own Mercedes Question
Mercedes Mechanic: Lou P. master tech, Mercedes Technician replied 2 years ago

ok did you hear any air leak noise when it latched? did the latch move in as if it was trying to pull in the lid even though it was open?

Ask Your Own Mercedes Question
Customer reply replied 2 years ago

no I did not hear an air leak noise just the pse working, the latch does not try to move in or pull the lid tighter, Im trying to get the proper alignment on this latch now and I will listen closer for a leak

Mercedes Mechanic: Lou P. master tech, Mercedes Technician replied 2 years ago

Ok it's possible the latch is frozen. It should move out when opened and in when latched. That would cause the kid to not pull down.

Ask Your Own Mercedes Question
Customer reply replied 2 years ago

I haven't got to it yet but when you say latch you are not referring to the metal pull down handle that slides in and out.... that handle is in the out position it will go in when the lid is latched but come right back out.

If you are referring to the pull down action when it is latched, i'm wondering whats going on there as well

Mercedes Mechanic: Lou P. master tech, Mercedes Technician replied 2 years ago

No I am talking about the part that grabs and pulls in. So when you close the trunk the two pieces that meet each other. I will see about getting a picture and circle what I am talking about. If the handle pulls in the element is working then that means the trunk larch assembly is frozen. Can you upload a picture of the trunk lid in its normal closed state so I can see how far it is from the body ?

Ask Your Own Mercedes Question
Customer reply replied 2 years ago

ok I will try to take some pics n upload

Mercedes Mechanic: Lou P. master tech, Mercedes Technician replied 2 years ago

Ok thanks!

Ask Your Own Mercedes Question
Mercedes Mechanic: Lou P. master tech, Mercedes Technician replied 2 years ago

here are some documents

Ask Your Own Mercedes Question
Customer reply replied 2 years ago

ok Lou iv'e got some pics one with the latch before assembly one with a rule and several left and right without rule the left side is flush but not the right and the last one of the latch handle protruding

2016-02-26_205334_736.jpg2016-02...jpg2016-02-26_205416_737.jpg2016-02...jpg2016-02-26_205455_739.jpg2016-02...jpg2016-02-26_205529_740.jpg2016-02...jpg2016-02-26_205604_741.jpg2016-02...jpg2016-02-26_205636_742.jpg2016-02...jpg2016-02-26_205706_746.jpg2016-02...jpg
Mercedes Mechanic: Lou P. master tech, Mercedes Technician replied 2 years ago

ok, so from what i can tell your rear latch assembly is the issue, it needs to be replaced. it is binding and will not pull in to close the trunk so the trunk remains in limbo, the pse continues to apply pressure or vacuum to pull the lid down and in turn drains the battery. i bet if you pull out fuse 62 for the pse it stays fine and the battery does not die. but that is what i would do.

Ask Your Own Mercedes Question
Customer reply replied 2 years ago

no bet cause that's exactly what Ive' been doing ha ha pulling the fuse under the seat

Mercedes Mechanic: Lou P. master tech, Mercedes Technician replied 2 years ago

OH, boo, well then you have 2 issues, do you park inside or outside and has it rained since the trunk has been sticking open?

Ask Your Own Mercedes Question
Customer reply replied 2 years ago

I usually park outside but it's been in for a couple of weeks now and yes it rained since the issue and it was outside but no rain entered the trunk...I just went rambo on it and inspected the PSE module which I installed and what's bugging me is that the soft close assist was working before I installed the PSE, is there a procedure for the cpu to recognise it after installation or something

Mercedes Mechanic: Lou P. master tech, Mercedes Technician replied 2 years ago

Where did you get the PSE from ?

Ask Your Own Mercedes Question
Customer reply replied 2 years ago

i have to check the files, i think rock auto...?

Mercedes Mechanic: Lou P. master tech, Mercedes Technician replied 2 years ago

Ok pull the fuse and re install it and see if the trunk works if not you may be missing a connector on the latch assembly.

Ask Your Own Mercedes Question
Customer reply replied 2 years ago

i mean does it need to be reset thru a star diagnostic??

Mercedes Mechanic: Lou P. master tech, Mercedes Technician replied 2 years ago

When you pull the power supply the module codes are erased. So the unit should function. Now the same PSE can be used for a few different models so it may have to be coded to your car before it will work. So if it is new then there is a possibility it has to be coded.

Ask Your Own Mercedes Question
Customer reply replied 2 years ago

well im afraid i'll have to have the dealer code it then...I try to stay away from them since I caught them red handed replacing a brand new part they put on with another brand new part 6 mths later

Mercedes Mechanic: Lou P. master tech, Mercedes Technician replied 2 years ago

If there are any European shops around your town then it may be worth a call to see if they have a Mercedes style scan tool. Sorry to hear your dealer is not trust worthy. I always made it a point to let customers know we were not the bad guy. Not all techs take the time out. And it's sad.

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: 5,901
5,901 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

5,901 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
Mercedes: antitheft..keys..car wont start..the dealership is closed
how do you deactivate the antitheft system on a mercedez ML320. I have my keys but somehow activated it and now my car wont start. I would need to be able to do it now since i am stuck and the dealers… read more
nelson garcia
nelson garcia
auto mechanic
Vocational, Technical or Trade Scho
270 satisfied customers
Mercedes Benz key programming. Need help.
How to program ignition key on a Mercedes?… read more
Stan
Stan
Technical support engineer
Bachelor\u0027s Degree
106 satisfied customers
Mercedes-Benz E320 The fan motor wont shut off when ignition
The fan motor won't shut off when ignition is turned off… read more
Marty
Marty
Mercedes Technician
Associate Degree
29,009 satisfied customers
Put a new battery in something keeps draining the battery
Put a new battery in something keeps draining the battery down … read more
Chad Farhat
Chad Farhat
Owner
Associate Degree
5,171 satisfied customers
What kind of battery is the auxiliary battery in an E350
What kind of battery is the auxiliary battery in an E350 wagon? And can I replace it myself? … read more
Kevin
Kevin
workshop foreman /master tech/mot tester
1 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
5,901 satisfied customers
I have a 2007 GL450. battery light (auxiliary battery) is
White battery light (auxiliary battery) is displayed I have replaced both batteries have been replaced - gl450 2007 The connections are secure. What else could throw this light? … read more
Pete
Pete
Independent Auto Technician
Vocational, Technical or Trade Scho
138 satisfied customers
What is the function of the auxiliary battery in the 2014
what is the function of the auxiliary battery in the 2014 E350? ( I just got a malfunction warning )… read more
Matt
Matt
Engineer
Bachelor's Degree
602 satisfied customers
The motor is turning but do not start. The battery was
Yes the battery was checked and there is no corrosion. There is no fire that goes to the sparkplugs … read more
Marty
Marty
Mercedes Technician
Associate Degree
29,009 satisfied customers
Will not start dash ligh up new battery. Battery connection
will not start dash ligh up new battery JA: Have you checked the battery, particularly the terminal connections? Are they corroded? Customer: battery connection is good JA: What is the model/year of y… read more
eric remington
eric remington
FORMER SHOP OWNER/TECHNICIAN/INSPECTOR
associates degree
580 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
5,901 satisfied customers
Replaced both Batteries and Battery warning light and
Replaced both Batteries and Battery warning light and workshop light stays on. … read more
Lou P. master tech
Lou P. master tech
Mercedes Technician
5,901 satisfied customers
Mercedes-Benz ML320 ml320 locked radio saying wait for over
ml320 locked radio saying wait for over a month… read more
Marty
Marty
Mercedes Technician
Associate Degree
29,009 satisfied customers
Mercedes-Benz SL500 how do i reset the computer system my
how do i reset the computer system? my console is locked.. the gas door is locked, the top won't work and can't lock or unlock the the doors with the remote… read more
Marty
Marty
Mercedes Technician
Associate Degree
29,009 satisfied customers
How do I reset me C230 out from limp home mode?
how do I reset me C230 out from limp home mode?… read more
John
John
Vocational, Technical or Trade Scho
1,209 satisfied customers
Mercedes-Benz 300E: How to disable alarm system?
JACustomer: Can I deactivate the Alarm system on my 1992 Mercedes-Benz 300E? I have tried unlocking and disconnect the battery.… read more
Marty
Marty
Mercedes Technician
Associate Degree
29,009 satisfied customers
2007 S550: no sound or stations, nor does the CD playerhowever the Nav
The radio on my 2007 S550 stopped working, no sound or stations, nor does the CD player however the Nav still looks like its working Any ideas?… read more
Marty
Marty
Mercedes Technician
Associate Degree
29,009 satisfied customers
Mercedes-Benz E320 problem with the alarm. Car will not start.
problem with the alarm. Car will not start. It went in to get a flat changed. When it came out it wouldn't start.… 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