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Related Mercedes Questions
Heater headache, 1984 300D. Fan blower always works.
Heater headache, 1984 300D. Fan blower always works. Intermittently just cold/cool air coming out.Sometimes gets worse, but the intermittency doesn't relate to the engine temp, RPM, idle, road velocit… read more
Lou Palomino
Lou Palomino
associates in automotive technology
10,432 satisfied customers
This is for Lou (preferred) or one of the other Mercedes
Hello. This is for Lou (preferred) or one of the other Mercedes experts. Working on an '88 420SEL (126.035 chassis). No heat. Have done some things already. Would like to discuss. … read more
Lou Palomino
Lou Palomino
associates in automotive technology
10,432 satisfied customers
I have an 82 Mercedes 380sl. I have replaced my mono valve
I have an 82 Mercedes 380sl. I have replaced my mono valve and my push button ac and heat unit but I'm still having heating issues. The thermostat was replaced too. The tube to the cabin temp sensor i… read more
Marty
Marty
Mercedes Technician
Associate Degree
30,558 satisfied customers
Heater blows cold air. I have replaced the monovalve, sent
Heater blows cold air. I have replaced the monovalve, sent the AC/Heater control switch out for testing and it came back as good. When the car is idling, the air is hot, but cold when driving. I wonde… 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
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
1985 USA Mercedes 380SL Climate Control (Heat): Car runs
1985 USA Mercedes 380SL Climate Control (Heat): Car runs very well (thank you, Marty!). However, no heater operation. I have already removed the dash, replaced all vaccuum solenoids and lines, repaire… 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
marty its steve,climate control questions. its about same thread
marty its steve,climate control questions. its about same thread we talked about. im not cheap, ill pay to talk again,but I need some help… read more
Marty
Marty
Mercedes Technician
Associate Degree
30,558 satisfied customers
300e: I have a 90 300e 2.6 having a similar issue to the one
I have a 90 300e 2.6 having a similar issue to the one described here on this post : http://www.justanswer.com/mercedes/86iu9-e300-2-6-91-300e-2-6-w124-hot-air-blows.html blows hot air at defrost vent… read more
Marty
Marty
Mercedes Technician
Associate Degree
30,558 satisfied customers
Mercedes Benz 300DT: I have a 1985 123 Body style, 300 DT Mercedes
I have a 1985 123 Body style, 300 DT Mercedes Sedan that I am experiencing Heater problems with . With engine running and car setting the heater seems to work ok . Climate Control is on Econ button in… read more
Marty
Marty
Mercedes Technician
Associate Degree
30,558 satisfied customers
350SDL: This is for Marty Only I have a 350SDL that whos
This is for Marty Only I have a 350SDL that whos heater is not working well. It is not heating up very well and it gets cold almost immediately.… read more
Marty
Marty
Mercedes Technician
Associate Degree
30,558 satisfied customers
eurotec rite on with torn heater mono valve...hot 12 v..grounded
eurotec rite on with torn heater mono valve. replaced it , but no heat yet ,no water circulation, both wires on mono valve are hot 12 v, what is cause and cure? should one be grounded ? which one? doe… read more
Marty
Marty
Mercedes Technician
Associate Degree
30,558 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
1991 300sel: climate adjustment..out luke warm air/ac works good
1991 300sel just 16 days ago hard/cold starting in the morning and if it sets for3-4 hrs it is the same. #2 The climate adjustment control when placed in hot only put out luke warm air/ac works good. … read more
Marty
Marty
Mercedes Technician
Associate Degree
30,558 satisfied customers
1993 mercedes 300te: either use the heater or the ac.
I have a 1993 mercedes 300te. The ac doesn't come on. you can either use the heater or the ac. but in order to do this the mechanic has to shut the heating system off & manueally do something under th… read more
Mike Kelly
Mike Kelly
Auto Mechanic
Vocational, Technical or Trade Scho
2,509 satisfied customers
wagon: mb..ac system..supposed to pick a temperature..ac was recharged
The AC on my 1984 MB 300TD wagon is acting weird. I have the 'climate control' version of AC system, where you are supposed to pick a temperature and leave it alone. The AC was recharged when I bought… 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
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MB Paul

MB Paul

Mercedes Technician

3,567 satisfied customers

Qualified Mercedes Benz Diagnostic Technician - 20+ years experience - Workshop Foreman for Mercedes

Marty

Marty

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Bosch Certified Master Tech. Over 35 years experience.

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Michael Warfield

Factory Mercedes-Benz Technician

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Matt

Matt

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Mechanical Engineer with 23 years experience in the auto industry, 8 yrs in formula 1 engine testing

promerc

promerc

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Hipo64

Hipo64

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3,488 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

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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.

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