Mercedes

Have Mercedes questions? Ask a mechanic for answers ASAP

Connect one-on-one with {0} who will answer your question

Related Mercedes Questions
Having issues with my 1986 560 sl not blowing hot air all
Having issues with my 1986 560 sl not blowing hot air all the time … read more
Matt
Matt
Engineer
Bachelor's Degree
771 satisfied customers
Heater issue. 1984 300D. Fan blower works. Usually just
Heater issue. 1984 300D. Fan blower works. Usually just cold/cool air coming out. It's been intermittent & getting worse. I flushed the coolant, flushed water back through the heater core. I replaced … read more
Eric
Eric
Retired
N/A
42,493 satisfied customers
Heats blowing out of defroster and side vents,while cold is
hello, heats blowing out of defroster and side vents,while cold is comingfrom center vents, compressor working ,replaced blower motor ,monovalve,vacuum tree under dash on 91 300e,ac still working inte… read more
Marty
Marty
Mercedes Technician
Associate Degree
30,558 satisfied customers
I'm having issues with my 1989 Mercedes 420 SEL heater. Do
I'm having issues with my 1989 Mercedes 420 SEL heater. Do you have someone that is knowledgable?… read more
Marty
Marty
Mercedes Technician
Associate Degree
30,558 satisfied customers
My name is ***** *****, I have been going through some pain
Customer: My name is ***** *****, I have been going through some pain with my 1985 300Sd heating No heat for the driver: Replaced teh following. Monovalve, water pump, aux water pump. disconected the … read more
sprinkles08
sprinkles08
Technician
High School or GED
19,838 satisfied customers
Marty, Further diagnosis on the heater problem in my 91
Hi Marty, Further diagnosis on the heater problem in my 91 560SEL. When the system is "on" there is no heat, and air blows cold. When it is "off" warm air comes through the side vents and floor vents … read more
Marty
Marty
Mercedes Technician
Associate Degree
30,558 satisfied customers
Marty, The heater on my 560SEL was blowing cold. I checked
Hello Marty, The heater on my 560SEL was blowing cold. I checked the monovalve and sure enough it was torn (see attached picture). I replaced it, but the heater still blows cold. Is there a correct po… read more
Marty
Marty
Mercedes Technician
Associate Degree
30,558 satisfied customers
I have an 87 560sl I replaced the mono valve and now at idle
I have an 87 560sl I replaced the mono valve and now at idle with monovalve unplugged I will have hot air but while driving the air cools off to barely warm. I know my temp wheel is not working right … read more
Marty
Marty
Mercedes Technician
Associate Degree
30,558 satisfied customers
Mercedes-Benz 420SEL: Good morning marty, i have the 1991 420sel
Good morning marty, i have the 1991 420sel and the heat was intermittant, since this happened before on a ssimilar car i ordered a new monovalve. in the past it is ususally caused by the rubber being … read more
Marty
Marty
Mercedes Technician
Associate Degree
30,558 satisfied customers
280SL: Have '83 280SL with heater that works fine at idle and
Have '83 280SL with heater that works fine at idle and slow speeds, goes cold on highway. Rebuilt monovalve - didn't help. Any ideas? It's cold here.… read more
Marty
Marty
Mercedes Technician
Associate Degree
30,558 satisfied customers
mercedes 560sl: 1987 mercedes 560sl, heat was intermittant,
1987 mercedes 560sl, heat was intermittant, only blowing warm on defrost. replaced monovalve. Now only blowing cold air. Found A/c compressor cycling even when dialed to heat. Now only blowing extreme… read more
Marty
Marty
Mercedes Technician
Associate Degree
30,558 satisfied customers
300SE: I have a 1991 Mercedes 300SE (W126 body style). I started
I have a 1991 Mercedes 300SE (W126 body style). I started having problems with the heating last winter. It would intermittently switch off and start blowing cold air. I thought it was the Mono-Valve. … read more
Juan Crespo
Juan Crespo
Sr. Technician
Bachelor's Degree
1,262 satisfied customers
89 560sel: nothing but cold air from my heater now..somtimes..shutting
i have an 89 560sel. i get nothing but cold air from my heater now. I can stop the engine and open my door and somtimes hear a door shutting and then the heater works. some vacuum actuated door is not… read more
Marty
Marty
Mercedes Technician
Associate Degree
30,558 satisfied customers
AC fan..intermittently..it blows, and sometimes it does
I am having trouble with my AC fan. It runs intermittently. Sometimes it blows, and sometimes it doesn't. It can be so erratic, that it starts and stops in several second intervals. Additionally, I so… read more
Michael Warfield
Michael Warfield
Factory Mercedes-Benz Technician
Vocational, Technical or Trade Scho
3,132 satisfied customers
280ce: h reg..control wheels..the vents end up blowing just cold air
H reg '92 W124 230CE (no A/C); If I set the control wheels to the warmest setting (fully red) and switch the fan on full the air gradually gets colder and colder. If I blow it onto the screen it start… read more
Marty
Marty
Mercedes Technician
Associate Degree
30,558 satisfied customers
The heater blow hot air when idling in park..faster..SE
Why does the heater blow hot air when idling in park, but turns to cold once you get going to about 30 mph and faster? 1985 380 SE… read more
Rob
Rob
Diagnostic Technician
High School or GED
196 satisfied customers
2000 SL 500 and the ac has good freon..fan blows..heater works
I have a 2000 SL 500 and the ac has good freon but still doesn't get reall cold.I set the temp on different settings and I get the same air temp.It doesn't help to put on the recirculating mode.The fa… read more
tech4benz
tech4benz
Master Certified Mercedes Technician
Associate Degree
196 satisfied customers
1989 Mercedes: heater..blowing cold air..defroster..a relay or vaccum
I have a 1989 Mercedes 420 sel and when using the heater the floor vents keep you warm but the air coming out of the vents at the window is blowing cold air. If you put the defroster on the air will w… read more
MBGuru
MBGuru
Bachelor's Degree
282 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.

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

30,558 satisfied customers

Bosch Certified Master Tech. Over 35 years experience.

Michael Warfield

Michael Warfield

Factory Mercedes-Benz Technician

3,132 satisfied customers

Mercedes-Benz Master Certified technician

Matt

Matt

Engineer

771 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.

Tim Mohr

Tim Mohr

ASE MASTER TECH

283 satisfied customers

30 YRS EXPERIENCE, FOREIGN AND DOMESTIC, GAS AND DEISEL

< Previous | Next >

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