AC Problems
Super Member
Joined: Jul 2005
Posts: 731
Likes: 1
W210 W140
What are common failures with W210 A/C Systems
The A/C system in my E300 isn't blowing cold air. I'm pretty sure its got a leak on it, but haven't pulled any codes for diagnostics yet to really determine. I realize this is faux pas, but my mechanic and I filled up my completely empty sytem over the weekend with fresh R124. 2lbs in total. Everything worked great once the system was recharged. Ice cold. Where are some common areas on the A/C system to cause leaks? Can these leaks be fixed via DIY, or should I have a pro do the job?
The compressor/dryer has been replaced on the S500 3 separate times! My hope is that this isn't the case for the E300.
The compressor/dryer has been replaced on the S500 3 separate times! My hope is that this isn't the case for the E300.
Member
Joined: Dec 2009
Posts: 168
Likes: 12
2004 E55
evaporators are somewhat common. there is also a hose coming off the receiver drier shaped like an s which leaks all the time. i occasionally see compressors leak as well. best thing is to get a fresh evac and recharge with leak dye. once the dye is in, the leaks are easy to find. for the evap, just check your garage floor after a few days. hopefully you dont have any leak dye on the floor from the drain tubes.
Junior Member
Joined: Aug 2003
Posts: 22
Likes: 0
From: Atlanta, Ga.
2002 C320- 2001 E430
Climate Control Help
I have a 2001 E430...When I turn my A/C on, the controls on one side is stuck on Auto, and the other is set to blow out of the defrost vents. I cannot get it to do anything as far as changing the settings. The compressor isn't coming on, and my fans under the hood are constantly running. No change even when adding refrigerant.
Junior Member
Joined: Jun 2010
Posts: 23
Likes: 0
1996 E320
96 E320 AC...
Our mechanic has told us that the two AC hoses need to be replaced on our 96 E320. We have the hoses but he’s unable to do the job.<?xml:namespace prefix = o ns = "urn:schemas-microsoft-com:office:office" /><o:p></o:p>
How much should the labor run on this job and are there any other expenses apart from the hoses?<o:p></o:p>
<o:p></o:p>
Thanks for any help,<o:p></o:p>
Marty.<o:p></o:p>
How much should the labor run on this job and are there any other expenses apart from the hoses?<o:p></o:p>
<o:p></o:p>
Thanks for any help,<o:p></o:p>
Marty.<o:p></o:p>
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Newbie
Joined: May 2010
Posts: 3
Likes: 0
From: Toronto
2002 E320 4Matic Wagon
Climate Control gremlin
I've just spent the last hour reading every post in this thread and only one person seems to have a similar problem as me and I'm already $1200 in the hole trying to fix it.
Problem: Climate control unit initially works fine on start-up. After about 10-20 minutes the fan starts to fade away even though screen says it should be on high. A few minutes later it will turn back on to max and then slowly go down again. This cycle repeats and I have no control of the fan, even in manual mode.
Solutions tried: replaced regulator, didn't solve it. Then sent control unit in to be tested. Apparently there was a problem so they "rebuilt" it. Got it back yesterday and the problem's still there.
Note: I just got the 2002 E320 wagon in November, and this problem didn't start showing itself until spring with the AC on. HOWEVER, it will do the same thing even if I have the EC button turned on.
My next step is obviously looking to replace the blower, but I'd REALLY like to stop just throwing money at this problem! Any help or advice is very much appreciated!
Here are my codes (first one is when things seem normal, second is when it's wacky):
1 = 25, 34
2 = 25, 26
3 = 03, 07
4 = 03, 07
5 = 02, 05
6 = 86, 88
7 = 11, 09
8 = 35, 44
No error codes.
Thanks.
Problem: Climate control unit initially works fine on start-up. After about 10-20 minutes the fan starts to fade away even though screen says it should be on high. A few minutes later it will turn back on to max and then slowly go down again. This cycle repeats and I have no control of the fan, even in manual mode.
Solutions tried: replaced regulator, didn't solve it. Then sent control unit in to be tested. Apparently there was a problem so they "rebuilt" it. Got it back yesterday and the problem's still there.
Note: I just got the 2002 E320 wagon in November, and this problem didn't start showing itself until spring with the AC on. HOWEVER, it will do the same thing even if I have the EC button turned on.
My next step is obviously looking to replace the blower, but I'd REALLY like to stop just throwing money at this problem! Any help or advice is very much appreciated!
Here are my codes (first one is when things seem normal, second is when it's wacky):
1 = 25, 34
2 = 25, 26
3 = 03, 07
4 = 03, 07
5 = 02, 05
6 = 86, 88
7 = 11, 09
8 = 35, 44
No error codes.
Thanks.
Junior Member
Joined: Jan 2009
Posts: 26
Likes: 0
E420
I've just spent the last hour reading every post in this thread and only one person seems to have a similar problem as me and I'm already $1200 in the hole trying to fix it.
Problem: Climate control unit initially works fine on start-up. After about 10-20 minutes the fan starts to fade away even though screen says it should be on high. A few minutes later it will turn back on to max and then slowly go down again. This cycle repeats and I have no control of the fan, even in manual mode.
Solutions tried: replaced regulator, didn't solve it. Then sent control unit in to be tested. Apparently there was a problem so they "rebuilt" it. Got it back yesterday and the problem's still there.
Note: I just got the 2002 E320 wagon in November, and this problem didn't start showing itself until spring with the AC on. HOWEVER, it will do the same thing even if I have the EC button turned on.
My next step is obviously looking to replace the blower, but I'd REALLY like to stop just throwing money at this problem! Any help or advice is very much appreciated!
Here are my codes (first one is when things seem normal, second is when it's wacky):
1 = 25, 34
2 = 25, 26
3 = 03, 07
4 = 03, 07
5 = 02, 05
6 = 86, 88
7 = 11, 09
8 = 35, 44
No error codes.
Thanks.
Problem: Climate control unit initially works fine on start-up. After about 10-20 minutes the fan starts to fade away even though screen says it should be on high. A few minutes later it will turn back on to max and then slowly go down again. This cycle repeats and I have no control of the fan, even in manual mode.
Solutions tried: replaced regulator, didn't solve it. Then sent control unit in to be tested. Apparently there was a problem so they "rebuilt" it. Got it back yesterday and the problem's still there.
Note: I just got the 2002 E320 wagon in November, and this problem didn't start showing itself until spring with the AC on. HOWEVER, it will do the same thing even if I have the EC button turned on.
My next step is obviously looking to replace the blower, but I'd REALLY like to stop just throwing money at this problem! Any help or advice is very much appreciated!
Here are my codes (first one is when things seem normal, second is when it's wacky):
1 = 25, 34
2 = 25, 26
3 = 03, 07
4 = 03, 07
5 = 02, 05
6 = 86, 88
7 = 11, 09
8 = 35, 44
No error codes.
Thanks.
i had a blower problem as well and it turned out to be the resistor control for the blower motor speed - ( mine only came with a new blower motor but found a fix from another model PRICY to buy together resistor was 25 bucks i think ) its located in the blower box, as mine would only run at low speed and showed hi on dash control < i could see the resistor control doing what yours is doing as well < its the way the unit works if you have not had it fixed yet i can supply the # for the resistor and directtions to install - jz
Newbie
Joined: May 2010
Posts: 3
Likes: 0
From: Toronto
2002 E320 4Matic Wagon
Resistor fix?
JZ, thanks for the reply. Yes! I'd be very interested in learning about your fix and how you did it. You're saying that it's a resistor that exists on the blower motor assembly? Or are you talking about the blower motor regulator (sometimes called resistor I think)? Because I've already replaced that (part # 2108211551).
Thanks again for any help.
Thanks again for any help.
Junior Member
Joined: Jan 2009
Posts: 26
Likes: 0
E420
JZ, thanks for the reply. Yes! I'd be very interested in learning about your fix and how you did it. You're saying that it's a resistor that exists on the blower motor assembly? Or are you talking about the blower motor regulator (sometimes called resistor I think)? Because I've already replaced that (part # 2108211551).
Thanks again for any help.
Thanks again for any help.
You might have this already i am not up on what this site offers hope my link works -- jz
http://www.eclassbenz.com/2010/02/ho...-malfunctions/
MBWorld Fanatic!
Joined: Nov 2008
Posts: 1,560
Likes: 10
210 55
Friends i have a trouble in my E55 
when i depress the acc pedal in the driveway the center vents comming to blow normal/ambient temp air instantly when i lift the acc pedal & the car runs by inercia they comming to blow cold air
I think the problem is caused by the vaccum lines, i want to hear about someone have this issue & whats the cause/problem?
(Forgot to tell: "No codes" in the HHT)
Fabio Daniel
when i depress the acc pedal in the driveway the center vents comming to blow normal/ambient temp air instantly when i lift the acc pedal & the car runs by inercia they comming to blow cold airI think the problem is caused by the vaccum lines, i want to hear about someone have this issue & whats the cause/problem?
(Forgot to tell: "No codes" in the HHT)
Fabio Daniel
Last edited by Fabio D; Jun 25, 2010 at 08:10 PM.
Senior Member
Joined: May 2008
Posts: 345
Likes: 0
From: Richmond, VA
1999 W210 E300 Turbodiesel
hi guys i just got a 96 E300 and i have some problems with ac, i tried to read the codes but i can't cause right side screen has bad pixels so i cant read'm.
driver side blows hot air and pass. Cold, when both in LOW temp.
when i turn it on and off i hear loud hissing sound from center vents
Helps please
driver side blows hot air and pass. Cold, when both in LOW temp.
when i turn it on and off i hear loud hissing sound from center vents
Helps please
Newbie
Joined: Jun 2010
Posts: 3
Likes: 0
From: TX
E420
E420 1997 AC issue
Normally happy with the way AC works as long as I start in garage the 105 temp outside are no problem just when car sits in heat doesn't catch up....Thanks for the help....Julia
1 28
2 39
3 17
4 13
5 20
6 74
7 14
8 55
1 28
2 39
3 17
4 13
5 20
6 74
7 14
8 55
Newbie
Joined: Jul 2010
Posts: 1
Likes: 0
E320
Hey everyone,
I have a 2001 E320 and the AC blows cold air when it's working properly but many times there is no air coming out of the vents (even when the fan control is set to max). It seems like the car does not properly sense the temperature and adjust the climate control accordingly. I think the dealership refilled r134 a few months ago but that did not solve the problem. Any advice would be appreciated. Thanks!
Here are the codes:
1 = 103
2 = 102
3 = 85
4 = 91
5 = 44
6 = 188
7 = 15
8 = 116
EB1234
EB1235
EB1416
I have a 2001 E320 and the AC blows cold air when it's working properly but many times there is no air coming out of the vents (even when the fan control is set to max). It seems like the car does not properly sense the temperature and adjust the climate control accordingly. I think the dealership refilled r134 a few months ago but that did not solve the problem. Any advice would be appreciated. Thanks!
Here are the codes:
1 = 103
2 = 102
3 = 85
4 = 91
5 = 44
6 = 188
7 = 15
8 = 116
EB1234
EB1235
EB1416
Newbie
Joined: Sep 2010
Posts: 4
Likes: 0
class e 320 cdi
hi i m new on the side i ave class E 320 i just ave thes problem : the a/c works but no cold air, i listen a whisle on the vents , could be low pressure on the system? could be a leak? i been reading the problem of semikolon and the answers of all of you guys. it's great the feedback i appricate some appions. thanks
p.s. should the fans in the front of the radiators should be working with the a/c on?
thanks one more time.
p.s. should the fans in the front of the radiators should be working with the a/c on?
thanks one more time.
Newbie
Joined: Aug 2010
Posts: 11
Likes: 0
2001 E320
I've just spent the last hour reading every post in this thread and only one person seems to have a similar problem as me and I'm already $1200 in the hole trying to fix it.
Problem: Climate control unit initially works fine on start-up. After about 10-20 minutes the fan starts to fade away even though screen says it should be on high. A few minutes later it will turn back on to max and then slowly go down again. This cycle repeats and I have no control of the fan, even in manual mode.
Solutions tried: replaced regulator, didn't solve it. Then sent control unit in to be tested. Apparently there was a problem so they "rebuilt" it. Got it back yesterday and the problem's still there.
Note: I just got the 2002 E320 wagon in November, and this problem didn't start showing itself until spring with the AC on. HOWEVER, it will do the same thing even if I have the EC button turned on.
My next step is obviously looking to replace the blower, but I'd REALLY like to stop just throwing money at this problem! Any help or advice is very much appreciated!
Here are my codes (first one is when things seem normal, second is when it's wacky):
1 = 25, 34
2 = 25, 26
3 = 03, 07
4 = 03, 07
5 = 02, 05
6 = 86, 88
7 = 11, 09
8 = 35, 44
No error codes.
Thanks.
Problem: Climate control unit initially works fine on start-up. After about 10-20 minutes the fan starts to fade away even though screen says it should be on high. A few minutes later it will turn back on to max and then slowly go down again. This cycle repeats and I have no control of the fan, even in manual mode.
Solutions tried: replaced regulator, didn't solve it. Then sent control unit in to be tested. Apparently there was a problem so they "rebuilt" it. Got it back yesterday and the problem's still there.
Note: I just got the 2002 E320 wagon in November, and this problem didn't start showing itself until spring with the AC on. HOWEVER, it will do the same thing even if I have the EC button turned on.
My next step is obviously looking to replace the blower, but I'd REALLY like to stop just throwing money at this problem! Any help or advice is very much appreciated!
Here are my codes (first one is when things seem normal, second is when it's wacky):
1 = 25, 34
2 = 25, 26
3 = 03, 07
4 = 03, 07
5 = 02, 05
6 = 86, 88
7 = 11, 09
8 = 35, 44
No error codes.
Thanks.
Newbie
Joined: Sep 2010
Posts: 4
Likes: 0
class e 320 cdi
hi
thanks to share oll info.
Ok whend t turn the a/c on,the funs do not work ( in front of the car)
I ave all the functions on the panel butit seems that do not have to much air out.
rebooted the sistem but keep the whistle.
if the funs is not working something ave to be whong?
thanks one more time for tha help.
thanks to share oll info.
Ok whend t turn the a/c on,the funs do not work ( in front of the car)
I ave all the functions on the panel butit seems that do not have to much air out.
rebooted the sistem but keep the whistle.
if the funs is not working something ave to be whong?
thanks one more time for tha help.
Newbie
Joined: Aug 2010
Posts: 11
Likes: 0
2001 E320
Did you find a fix for this yet? I'm having a simular problem with the ac on doesn't matter what position the fan is on the ac works when it wants. Turns on for minutes and then off for a few minutes. It's pretty random and it's with the ac or heat it just works when it wants. Any suggestions would be great!
TTT
Any ideas what I should look at first?
Newbie
Joined: May 2010
Posts: 3
Likes: 0
From: Toronto
2002 E320 4Matic Wagon
I updated my fix in another thread. In a nutshell, it turned out that the regulator that was originally replaced as a fix for the problem was a knock-off (not an original MB part). When we put in the legit MB regulator everything has worked fine since (4 months of summer).
Basically the knock-off regulator was overheating and then resetting once it cooled down. Hence the random fan behaviour. As long as you get an OEM part the repair can be done yourself with a few screwdrivers in about half an hour, if you don't mind bending yourself into the passenger footwell.
Basically the knock-off regulator was overheating and then resetting once it cooled down. Hence the random fan behaviour. As long as you get an OEM part the repair can be done yourself with a few screwdrivers in about half an hour, if you don't mind bending yourself into the passenger footwell.
