A/C Operation Question
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Newbie
Joined: Dec 2021
Posts: 11
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From: Palm Desert in the winter and Vancouver Canada in the summer
2008 E350 4 Matic
A/C Operation Question
2008 E350 4Matic…New Owner…Lots of questions…here goes
When you start the car after it sits overnight or after it sits for a few hours the a/c automatically comes on. The a/ c switch has not been activated nor is the red light on in the switch and The system is not in Auto. The a/c stays on for about 5 minutes then goes off. There are lots of days when we don't want a/c so its a bit annoying. Is this normal or?
I also never see water dripping from under the car when the a/c is running for extended periods of time…normal or? We do get some stinky a/c smells so wondering if the drain tubes might be blocked. Cabin air filter changed. Watched a video on youtube that showed how to remove the tube under the dash and then spray a disinfectant into the system to kill any bacteria, mold etc…a good idea or ?
When you start the car after it sits overnight or after it sits for a few hours the a/c automatically comes on. The a/ c switch has not been activated nor is the red light on in the switch and The system is not in Auto. The a/c stays on for about 5 minutes then goes off. There are lots of days when we don't want a/c so its a bit annoying. Is this normal or?
I also never see water dripping from under the car when the a/c is running for extended periods of time…normal or? We do get some stinky a/c smells so wondering if the drain tubes might be blocked. Cabin air filter changed. Watched a video on youtube that showed how to remove the tube under the dash and then spray a disinfectant into the system to kill any bacteria, mold etc…a good idea or ?
Out Of Control!!
Joined: Sep 2018
Posts: 14,692
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From: unbegrenzt
2017 GLE350 4MATIC
Welcome! Please post a photo of the E350. Smelly A/C is common. No fix available, just a treatment as you mentioned. For the A/C control questions, try posting in the W212 section where owners will see it and can provide suggestions.
Thread Starter
Newbie
Joined: Dec 2021
Posts: 11
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From: Palm Desert in the winter and Vancouver Canada in the summer
2008 E350 4 Matic
Thanks…will post a better photo shortly. Curious…why W212…thought my 2008 was a W211 which is where I thought I posted…
Junior Member
Joined: Mar 2020
Posts: 46
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From: the netherlands
Mercedes w211 2007
I have the same ''problem''. When starting the car, the compressor runs for about 5 minutes (I know this because it makes a bit of noise) and then shuts off. Even though the button is off. Very annoying because when it shuts off after 5 minutes, the windows start fogging up until the evaporator core has dried up again. Especially in the current colder days it's annoying. I'm going to disconnect the AC pressure sensor for the winter months just to prevent it from coming on.
Thread Starter
Newbie
Joined: Dec 2021
Posts: 11
Likes: 2
From: Palm Desert in the winter and Vancouver Canada in the summer
2008 E350 4 Matic
I have the same ''problem''. When starting the car, the compressor runs for about 5 minutes (I know this because it makes a bit of noise) and then shuts off. Even though the button is off. Very annoying because when it shuts off after 5 minutes, the windows start fogging up until the evaporator core has dried up again. Especially in the current colder days it's annoying. I'm going to disconnect the AC pressure sensor for the winter months just to prevent it from coming on.
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From: Palm Desert in the winter and Vancouver Canada in the summer
2008 E350 4 Matic
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Junior Member
Joined: Oct 2015
Posts: 52
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From: OH
W211 wagon believer
Congrats on the car! If things go right I should be finally getting mine next week.
From what I've read, A/C smelling musty/moldy is common, as stated above. My ATS has the same issue, I just turn off A/C and let it blow heat for the last 5 -10 minutes of my drive to try things out instead of shutting off the car with A/C still running. Seems to help on that car, don't know if that will work on a W211.
From what I've read, A/C smelling musty/moldy is common, as stated above. My ATS has the same issue, I just turn off A/C and let it blow heat for the last 5 -10 minutes of my drive to try things out instead of shutting off the car with A/C still running. Seems to help on that car, don't know if that will work on a W211.
Last edited by Red Ryder; Dec 9, 2021 at 02:28 PM.
Junior Member
Joined: Mar 2020
Posts: 46
Likes: 16
From: the netherlands
Mercedes w211 2007
No the sensor is new. I'm disconnecting it so the system thinks there is no pressure and it won't turn on to protect the AC pump. I always have to use the ''rest'' function on the climate control when I park the car for the night to dry the evaporator core. If I don't do that, the inside of the windows are fogged up really badly in the morning. In the summer days it's not that bad and I need the AC for cool air (I live in the Netherlands).
Senior Member
Joined: Aug 2014
Posts: 337
Likes: 20
From: Charlotte, NC
2005 E320 CDI, 2015 GLA 250
I met an MB engineer at an SAE convention and he talked about the need to run the compressor to better control the humidity in the car. Maybe air condition and heat simultaneously as he said it would cause sinus problems otherwise (stuck his finger in his nose??) and said this was important.
Peter
Peter
Senior Member
Joined: Aug 2014
Posts: 337
Likes: 20
From: Charlotte, NC
2005 E320 CDI, 2015 GLA 250
Does anybody have experience with an intermittent AC?
My ‘05 E320 CDI didn’t have air conditioning the other day. I turned it off and on but nothing, no cooling, no fan, no defrost. I turned it off and rolled down the windows.
Ten minutes later while driving down the highway, I tried again and it came back on.
A relay problem has been suggested.
Peter
My ‘05 E320 CDI didn’t have air conditioning the other day. I turned it off and on but nothing, no cooling, no fan, no defrost. I turned it off and rolled down the windows.
Ten minutes later while driving down the highway, I tried again and it came back on.
A relay problem has been suggested.
Peter
Senior Member
Joined: Aug 2014
Posts: 337
Likes: 20
From: Charlotte, NC
2005 E320 CDI, 2015 GLA 250
Four other bits that may be related.
1. I didn’t cycle the ignition as I was driving on the highway so I don’t know if that would have helped.
2. A message came on saying the Dynamic Seats were being turned off (and they wouldn’t turn back on). The message was only briefly displayed and this may have happened in the past as I’ve found them off before despite never turning them off.
3. Due to the pandemic, the car is not being driven nearly as much as in the past. 235,000 miles total but maybe only 2,000 in the last year.
4. The two batteries are less than a year old. When I do drive it, it is probably for 50 miles.
Peter
1. I didn’t cycle the ignition as I was driving on the highway so I don’t know if that would have helped.
2. A message came on saying the Dynamic Seats were being turned off (and they wouldn’t turn back on). The message was only briefly displayed and this may have happened in the past as I’ve found them off before despite never turning them off.
3. Due to the pandemic, the car is not being driven nearly as much as in the past. 235,000 miles total but maybe only 2,000 in the last year.
4. The two batteries are less than a year old. When I do drive it, it is probably for 50 miles.
Peter
Super Member
Joined: Apr 2007
Posts: 633
Likes: 48
From: USA
2006 E320 CDI
Does anybody have experience with an intermittent AC?
My ‘05 E320 CDI didn’t have air conditioning the other day. I turned it off and on but nothing, no cooling, no fan, no defrost. I turned it off and rolled down the windows.
Ten minutes later while driving down the highway, I tried again and it came back on.
A relay problem has been suggested.
Peter
My ‘05 E320 CDI didn’t have air conditioning the other day. I turned it off and on but nothing, no cooling, no fan, no defrost. I turned it off and rolled down the windows.
Ten minutes later while driving down the highway, I tried again and it came back on.
A relay problem has been suggested.
Peter
not difficult to replace.
Senior Member
Joined: Aug 2014
Posts: 337
Likes: 20
From: Charlotte, NC
2005 E320 CDI, 2015 GLA 250
Thanks. That was a year ago and I did replace both the fan and the resistor. AND, it did solve the problem.
However, on rare occasion, the fan cuts off for about two seconds. Just as I get concerned that it has failed, it turns back on. I’m guessing it is a loose connector but it is so rare of an event, I don’t spend much time thinking about it.
Regards,
Peter
However, on rare occasion, the fan cuts off for about two seconds. Just as I get concerned that it has failed, it turns back on. I’m guessing it is a loose connector but it is so rare of an event, I don’t spend much time thinking about it.
Regards,
Peter
