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I have a 1985 Mercedes 380sl. I have no heat. I changed out
I have a 1985 Mercedes 380sl. I have no heat. I changed out the monovalve with no luck. I have heat if the car is in accessory for only a couple of minutes. I do not have heat when the car is running … read more
Lou Palomino
Lou Palomino
associates in automotive technology
10,278 satisfied customers
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
10,278 satisfied customers
I have 1984 Mercedes 380sl. I had the air all revamped the
I have 1984 Mercedes 380sl . I had the air all revamped the car blows cold but only on the to side vents and defroster vents >. Nothing comes out of the center vents , no air at all, I was told tha… read more
Marty
Marty
Mercedes Technician
Associate Degree
57,141 satisfied customers
I'm hoping someone can help. I have a 1989 560SL and there
I'm hoping someone can help. I have a 1989 560SL and there is no heat being returned in the EC mode setting with the temperature wheel set to the max heater setting with the blower on high. This is wi… read more
Lou Palomino
Lou Palomino
associates in automotive technology
10,278 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
57,141 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
57,141 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
57,141 satisfied customers
e300 2.6: I have a 91 300e 2.6 w124 and hot air blows out
update...i took the valve apart that is beside the battery, cleaned it and now it seems to be working ok i have a 91 300e 2.6 w124 and hot air blows out the vents constantly. I pulled the glove box an… read more
Expert
Expert
C230: 1998 C230 a/c blower intermittent. Usually comes on first
1998 C230 a/c blower intermittent. Usually comes on first thing in the morning but not always on restart. I can always hear the coolant flowing when car is started and there is cold air coming out of … read more
Michael Warfield
Michael Warfield
Factory Mercedes-Benz Technician
Vocational, Technical or Trade Scho
3,132 satisfied customers
1983 Mercedes: previous owner..dealership..Control Module..push button
A/C not working on 1983 Mercedes 300SD. Six years ago previous owner had A/C repaired by the Mercedes dealership in Augusta, Georgia. Items replaced included 1 126-830-02-85 Control Module, part 126-8… read more
Marty
Marty
Mercedes Technician
Associate Degree
57,141 satisfied customers
Everything is off and air only blows through defrost vent
air condition doesnt always come on, heat comes when everything is off and air only blows through defrost vent… read more
Marty
Marty
Mercedes Technician
Associate Degree
57,141 satisfied customers
Tempcontrol..EC..The resistor stopped constant blowing issue
Installed new temp control panel and resistor. I can see the display now and EC button if off. The resistor stopped constant blowing issue. But air is not cold. Took it to a shop for freon re-charge. … read more
Marty
Marty
Mercedes Technician
Associate Degree
57,141 satisfied customers
1985 300TD: blower fan..fan relay or circuit..defrost..center console
I own a 1985 300TD and sometimes the blower fan works when i turn the ac on and sometimes it does not. Would like to know if the problem is the fan relay or circuit panel. Also the ac blows from the d… read more
Marty
Marty
Mercedes Technician
Associate Degree
57,141 satisfied customers
2002 Mercedes ML 320 I Started the car one morning and began
2002 Mercedes ML 320 –I Started the car one morning and began smelling burning rubber. The AC was working fine and blowing cold AC air. I parked for 4 hours and then later started the car; at that poi… read more
Marty
Marty
Mercedes Technician
Associate Degree
57,141 satisfied customers
Mercedes: manually..defroster all other vents blow cold
how to turn heat manually on mercedes w126 heat only out of defroster all other vents blow cold… read more
mbfixer
mbfixer
Shop manager
High School or GED
453 satisfied customers
94 S420: Benz..nice cold air in the summer..hot air..windshield
I have a 94 S420 Benz. When I use the A/C, it works fine and blows nice cold air in the summer. Now I'm trying to use the Heat for the winter but the hot air is blowing really soft and will only blow … read more
Marty
Marty
Mercedes Technician
Associate Degree
57,141 satisfied customers
my a/c works fine and blows hard out the side vent
my a/c works fine and blows hard out the side vent, however it does not blow our the center vents, where are the ducts ran from and how do i access them to check if they are connected?… read more
Rob
Rob
Diagnostic Technician
High School or GED
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
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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

57,141 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

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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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