Mercedes

Have Mercedes questions? Ask a mechanic for answers ASAP

Ask an Expert,
Get an Answer ASAP!

1990 300e "CEL" on diagnostic box LED flashes 5x

Customer Question
1990 300E "CEL" is on...

1990 300E "CEL" is on, pressed button on the diagnostic box LED flashes 5x ? Your site says "Answers ASAP", waiting almost 1 hr.........

Submitted: 3 years ago.Category: Mercedes
Show More
Show Less
Ask Your Own Mercedes Question
Answered in 52 minutes by:
6/12/2015
Mercedes Mechanic: Lou P. master tech, Mercedes Technician replied 3 years ago
Lou P. master tech
Lou P. master tech, Mercedes Technician
Category: Mercedes
Satisfied Customers: 6,272
Experience: 20 years Master Certified excellent fix rate and have access to factory wiring, and instructions.
Verified
Hello my name is ***** ***** i will do my best to help you , i strive for EXCELLENT service and nothing less. Tomorrow I can upload to you all of the flashing codes that way you can have them on file.
Ask Your Own Mercedes Question
Customer reply replied 3 years ago

I looked up LED flashes 5x on other forums and answer was EGR inop, so can I be confident this is the discrepant part ?

Mercedes Mechanic: Lou P. master tech, Mercedes Technician replied 3 years ago
I do notice trusting forums. No real mechanics use forums. Only the normal do it yourselfer that really does not know what they are saying lol. They heard or read it somewhere so they post it. I can get you the complete diagnostic routine and all the flash meanings tomorrow. It's only available on the job site. Hope that is ok.
Ask Your Own Mercedes Question
Mercedes Mechanic: Lou P. master tech, Mercedes Technician replied 3 years ago
ok here is the chart, to erase the codes, hold the button down for 8-10 seconds for each individual code, the egr is usually the fault located on the passenger side of the engine, make sure there is vacuum present from the solenoid in the front of the engine when th engine is above 3000 rpm. hope this helps. click the link below. Please take a second and click the box and rate my service GOOD OR EXCELLENT SERVICE if you feel I have been helpful and please request me in the future. If you feel I have not been helpful please DO NOT RATE BAD OR POOR 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. Lou. also , if you feel i deserve one , BONUSES are GREATLY APPRECIATED ! 😉

Keep in mind that rating me does not end the chat, it simply credits me for assisting, i will still be here to help if follow up information is needed , Lou.


DIAGNOSTIC CODES
Ask Your Own Mercedes Question
Mercedes Mechanic: Lou P. master tech, Mercedes Technician replied 3 years ago
I have taken my time to answer your question the best i could and i will continue to help if you need follow up information , all i ask is that you PLEASE take a second to rate my service so i may recieve my credit for assisting you. Thank you.
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 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: 6,272
6,272 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

29,460 satisfied customers

Bosch Certified Master Tech. Over 35 years experience.

Lou P. master tech

Lou P. master tech

Mercedes Technician

6,272 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
Have a 1988 300E with about 142,000 Miles. It has a Check
Have a 1988 300E with about 142,000 Miles. It has a Check Engine Light problem. The CEL comes on after 3 minutes and turns on and off when driving. It Shows 30 Flashes on port #7 (COOLANT CIRCULATION … read more
Marty
Marty
Mercedes Technician
Associate Degree
29,460 satisfied customers
Mercedes-Benz C230: My 1997 Mercedes model C230 serial # XXXXX
My 1997 Mercedes model C230 serial # XXXXX air conditioner clutch will engage for only 1-2 minutes and the electric radiator fan will come on for the same amount of time on low speed only, and then sh… read more
Hipo64
Hipo64
Mercedes Technician
High School or GED
444 satisfied customers
300e: i have a 92 300e Vin#WDBEA26D5NB737553 and my radio is
i have a 92 300e Vin#WDBEA26D5NB737553 and my radio is locked I need the code for the radio and how would i install it… read more
Marty
Marty
Mercedes Technician
Associate Degree
29,460 satisfied customers
Mercedes S420: I have a 1994 s420 MB. The check engine light
I have a 1994 s420 MB. The check engine light is on. In trying to read the code from the LED light next to the 38-pin adapter housing, it doesnt blink out any codes. It just stays lit while holding it… read more
Chris (aka - Moose)
Chris (aka - Moose)
Vocational, Technical or Trade Scho
108 satisfied customers
300E 4MATIC: I HAVE A 1990 300E 4MATIC SEDAN(230K). THE 4 WHEEL
I HAVE A 1990 300E 4MATIC SEDAN(230K). THEXXXXXICON IN THE CENTER OF THE SPEEDOMETER (LIGHTS UP ORANGE) COMES ON ONLY AT SPEEDS 55MPH & HIGHER. I HAVE REPLACED THE LEFT & RIGHT FRONT WHEEL SPEED SENSO… read more
Chris (aka - Moose)
Chris (aka - Moose)
Vocational, Technical or Trade Scho
108 satisfied customers
ground..red lite in the actuator switch came on steady.
I connected the wire from #10 pole to ground # XXXXX pole. The red lite in the actuator switch came on steady. I pulled the wire after 10 sec between #10 and #1 and the switch had no change. Still fla… read more
Marty
Marty
Mercedes Technician
Associate Degree
29,460 satisfied customers
1991 Mercedes 300TE: a check engine light..emissions..module..steady
How can I read and clear a check engine light on my 1991 Mercedes 300TE w/California emissions. I have tried to use the LED module w/ the push button, but when I press the button the LED just stays on… read more
Stan
Stan
Technical support engineer
Bachelor\u0027s Degree
106 satisfied customers
Sorry, ths si my first time and I didnt see the answeres worked.
never mind, I found it. Sorry, ths si my first time and I didn't see the answeres worked. I was waiting for an email answer, and that's noth ow it works. I'll try the fuse in the relay,… read more
molurch
molurch
Owner
Vocational, Technical or Trade Scho
941 satisfied customers
1986 mercedes 300e: no spark to the plugs i changed the coil
my 1986 mercedes 300e has no spark to the plugs i changed the coil 3 times and nothing can you help me… read more
Marty
Marty
Mercedes Technician
Associate Degree
29,460 satisfied customers
1990 Mercedes Benz: My car will not blow heat on occasion, and when it
I have a 1990 Mercedes Benz 300E. My car will not blow heat on occasion, and when it does it's not when I expect it. What is the problem?… read more
Marty
Marty
Mercedes Technician
Associate Degree
29,460 satisfied customers
2002 C320: electronic car key..my car, unlock the doors or anything
I have a 2002 C320. I accidently hit the little red panic botton on my black electronic car key and now I can't access my car, unlock the doors or anything. How do I de-activate whatever I did so I ca… read more
Victor MB
Victor MB
Vocational, Technical or Trade Scho
204 satisfied customers
300E: Engine warning light..tried by disconnecting battery
1990 MZB 300E Engine warning light on. Code blips #17 What code is this and how do I reset the warning light. I have tried by disconnecting battery for a minute..… read more
MBTim
MBTim
Master Technician
Vocational, Technical or Trade Scho
70 satisfied customers
Mercedes: engine light..it needed a egr Valve- it blinked 14 times
I have a 1990 300 CE Mercedes. The engine light is on. When we pushed the buttons it blinked 5x. ( I saw the mechanic do this before when the light was on and it needed a EGR Valve- it blinked 14 time… read more
Mike
Mike
Proprieter / Diagnostic Technician
High School or GED
1989 300te: intermittent cel light flickers..relay..fuel filter
1989 300te mercedes. intermittent CEL light flickers..when it flickers the engine runs rough - flickers when cold, hot or inbetween. we have replaced overload protection relay, full tuneup, and fuel f… read more
MBTim
MBTim
Master Technician
Vocational, Technical or Trade Scho
70 satisfied customers
92 mercedes 200: spark..any info on the ignition system..trouble shoot
my friend has a problem with his 92 Mercades 300 TE. The main problem is that it is not getting any spark. But I can't get any info on the ignition system, or how to trouble shoot it. Can you help...p… read more
AbloW_MB
AbloW_MB
Automotive Technician
Vocational, Technical or Trade Scho
1995 E420: a dm code of 20 (led blinks 20 times), what
I have a 1995 E420 with a dm code of 20 (led blinks 20 times), what is the most probable cause??… read more
MBZ TECH
MBZ TECH
MERCEDES TECH,TEAM LEADER/TRAINER
High School or GED
32 satisfied customers
my break light does not work after I pressed the brake even ...
my break light does not work after I pressed the brake even though my tail light is on..I also have this problem: the coolant temperature,fuel,and oil presure gauges stop working ........are both prob… read more
Expert
Expert
Mercedes: garage door opener with my garage door unit
Cannot sync the Mercedes programmable built-in garage door opener with my garage door unit… read more
molurch
molurch
Owner
Vocational, Technical or Trade Scho
941 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