"Auto" setting on climate control
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Mercedes Benz E-350
"Auto" setting on climate control
After parking out in the sun and heat, (Tampa, Fl.), after starting the car, the air volume coming out of the vents in the A/C mode (temp. set at 78 degrees) came on at the highest level. Understandable as it was quite hot inside the car.My wife standing outside the car near the front was completely surprised by the fan noise emitting from beneath the hood. As long as the climate control was in the "Auto" mode, the speed of the fan would not decrease. I thought it would decrease as I drove, but after close to 15 miles of driving, there was no decrease in the volume of air coming out of the vents. Could not hear the radio from the loud blowing noise. Had to use the rocker switch to manually control the speed. Started to experiment as I drove by raising the temperature and still no decrease of air blowing from vents. Same event also occurred today. This only occurs when car is parked in the sun/heat. It is garaged at night, so normal operation of fan speed blowing in the AM is normal. Did not experience this during the winter months, but the heat is coming on now in Florida. Any ideas/suggestions before I take the car into the dealer would be greatly appreciated. It is a 2010 E-350, so any issue will be covered by warranty, but would like to have some knowledge before showing up at the dealership. Thank you 
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W213, C238
After parking out in the sun and heat, (Tampa, Fl.), after starting the car, the air volume coming out of the vents in the A/C mode (temp. set at 78 degrees) came on at the highest level. Understandable as it was quite hot inside the car.My wife standing outside the car near the front was completely surprised by the fan noise emitting from beneath the hood. As long as the climate control was in the "Auto" mode, the speed of the fan would not decrease. I thought it would decrease as I drove, but after close to 15 miles of driving, there was no decrease in the volume of air coming out of the vents. Could not hear the radio from the loud blowing noise. Had to use the rocker switch to manually control the speed. Started to experiment as I drove by raising the temperature and still no decrease of air blowing from vents. Same event also occurred today. This only occurs when car is parked in the sun/heat. It is garaged at night, so normal operation of fan speed blowing in the AM is normal. Did not experience this during the winter months, but the heat is coming on now in Florida. Any ideas/suggestions before I take the car into the dealer would be greatly appreciated. It is a 2010 E-350, so any issue will be covered by warranty, but would like to have some knowledge before showing up at the dealership. Thank you
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Mercedes Benz E-350
Wig: Thank You for your prompt reply. It is appreciated. I had strongly considered your suggestion, but thought with the outside temperature only 82 degrees, it would reach the inside temperature of 78 degrees quickly. Perhaps my assumption was incorrect. Hopefully others will jump on this thread and provide their thoughts/opinions.
Again, thank You Wig for your prompt reply. I am in the learning stage with this car and appreciate all input.
Semper fi
Again, thank You Wig for your prompt reply. I am in the learning stage with this car and appreciate all input.
Semper fi
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2023 AMG EQS
If the outside temp is 82f and its sunny if your windows are not tinted then the temp inside the car will always be above outside temp.
Sometimes it's just easier to drive with the windows open for a minute or two so that all the hot air leaves the car.
oorah
Sometimes it's just easier to drive with the windows open for a minute or two so that all the hot air leaves the car.
oorah
Last edited by Tjdehya; Apr 4, 2011 at 08:59 PM.
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Mercedes Benz E-350
Tjdehya:Thank you for post. Good info and beginning to make sense. Windows are not tinted and I had the cover slid back allowing light/sun to enter through the abbreviated glass roof. Am beginning to believe that perhaps I do not have an "Auto" problem on the climate control, but rather simply the heat is cranking up in Florida and will manually adjust air flow with the rocker switches. Greatly appreciate your take on my concern Tjdehya. Anyone else out their that has an opinion, jump in.
Semper fi !!
Semper fi !!
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S65
May want to check the climate control sensor fan. I don't know if yours has one, but all of the MB's I've seen have a little fan in front or behind the sensor that pulls cabin air over the temperature sensor in order to calculate cabin temperature.
The fan blades tend to get crud on them and lose their ability to pull air, or the motors simply fail.
The fan blades tend to get crud on them and lose their ability to pull air, or the motors simply fail.
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Mercedes Benz E-350
Sathinas: Did not have knowledge of a small fan located near the sensor that pulls/pushes cabin air over the temperature sensor in order to calculate cabin temperature. I am going to rule out the crud on the blades as the car is only a little over 7 months old, but the failed motor is a distinct possibility to review/examine.
Thank you for your input and suggested problem area.
Semper fi !!
Thank you for your input and suggested problem area.
Semper fi !!
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2017 S550 Iridium / Black Nappa, 2015 GL 550 Paladium Silver
Sathinas: Did not have knowledge of a small fan located near the sensor that pulls/pushes cabin air over the temperature sensor in order to calculate cabin temperature. I am going to rule out the crud on the blades as the car is only a little over 7 months old, but the failed motor is a distinct possibility to review/examine.
Thank you for your input and suggested problem area.
Semper fi !!
Thank you for your input and suggested problem area.
Semper fi !!
My $0.02.
I'm no expert, but I did sleep at a Holiday Inn last night.
Last edited by Pntblnk; Apr 5, 2011 at 09:31 AM.
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Mercedes Benz E-350
Pntblnk: Thank you for your post and validation of what may be occurring. Going into the dealership tomorrow AM and will post up what I find out.
Roof over your head, bed and a shower; beats the boonies any night.
Semper fi !!
Roof over your head, bed and a shower; beats the boonies any night.
Semper fi !!
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2010 E350 Luxury Sedan, Engine 272 (V6)
When this happens in my car in S.C., I just hit the fan button to lower fan speed. It changes the system to regular A/C. When car cools down, I hit the Auto button and it works normally.
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Airborne!
Last edited by El Cid; Apr 5, 2011 at 06:08 PM.
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2012 S350 Bluetec 4Matic, Diamond White, P2
This sounds like the normal operation of every automobile that I have owned for the past 20 years with Auto climate control. Now, if it never lowers the fan speed even after it has cooled down for a while, then there is a problem.
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Mercedes Benz E-350
El Cid: Thanks for the post. Rainy overcast day in Tampa, so no repeat of problem I have been experiencing. Good tip as to how to handle in future if no fan problem found at dealership tomorrow.
Semper fi !!
Semper fi !!
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Mercedes Benz E-350
ImInPA: Thanks for the post. Have driven the car for over 1/2 hour with temp. set at 78 degrees. No decrease in fan speed. Ratcheted it up to 80-81-82 degrees and still no slow down in fan speed. Sathinas suggested the climate control sensor fan as well as the temperature sensor. Those areas will be starting point when going to the dealership tomorrow.
Again, thanks for your experience and will post up tomorrow after visiting the dealership.
Semper fi !!
Again, thanks for your experience and will post up tomorrow after visiting the dealership.
Semper fi !!
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2015 GL450
ImInPA: Thanks for the post. Have driven the car for over 1/2 hour with temp. set at 78 degrees. No decrease in fan speed. Ratcheted it up to 80-81-82 degrees and still no slow down in fan speed. Sathinas suggested the climate control sensor fan as well as the temperature sensor. Those areas will be starting point when going to the dealership tomorrow.
Again, thanks for your experience and will post up tomorrow after visiting the dealership.
Semper fi !!
Again, thanks for your experience and will post up tomorrow after visiting the dealership.
Semper fi !!
Good luck tomorrow.
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Mercedes Benz E-350
Took the car by the dealership yesterday and they were unable to find anything out of what is termed "normal". They felt that because the car is black with black interior, that is contributing to the high heat concentration inside the vehicle when parked in the sun, resulting in high fan speed when in "Auto" mode. Difficult to debate that point, so will continue to monitor situation under different variables. Appreciate all the input provided and will keep you updated.
Semper fi
Semper fi
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2012 S350 Bluetec 4Matic, Diamond White, P2
Another thing that has not been mentioned. Do you have the MAX/AC button pushed? This will cause the fan to stay on high and overrides the AUTO setting.
Just a thought.
Just a thought.
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E350
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2010 E350 Luxury Sedan, Engine 272 (V6)
Sun Roof
I tend to leave my sunroof tilted open when I park the car in the sun. Assuming I feel secure about the area and no chance of rain (or pollen).
Another reason to leave tilted for newer cars is that it lets the "plastics" evaporation to escape. Happens in all cars as plastics, vinyl, etc. give off a gas for first few months. May build up on inside of windows.
BTW, What is the difference between a Sun Roof and a Moon Roof?
Another reason to leave tilted for newer cars is that it lets the "plastics" evaporation to escape. Happens in all cars as plastics, vinyl, etc. give off a gas for first few months. May build up on inside of windows.
BTW, What is the difference between a Sun Roof and a Moon Roof?
Last edited by El Cid; Apr 8, 2011 at 02:22 PM.
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E350
1. Depends on the time of day and/or how much you have been drinking or smoking.
2. From Answers.com
In the 1970s, Ford introduced a glass sunroof that they named the Moonroof (actually, the American Sunroof Company, the company that made all domestic sunroofs and now known as American Specialty Cars invented it, but Ford was the first to install it). So to answer the question, a moonroof is a sunroof made of glass. The problem is, the distinction is becoming lost as more and more people use it incorrectly, Most people today just consider any sort of hole in the roof a sunroof. But in the strictest sense, sunroof=metal, moonroof=glass.
Read more: http://wiki.answers.com/Q/Is_there_a...#ixzz1IxVjzALo
2. From Answers.com
In the 1970s, Ford introduced a glass sunroof that they named the Moonroof (actually, the American Sunroof Company, the company that made all domestic sunroofs and now known as American Specialty Cars invented it, but Ford was the first to install it). So to answer the question, a moonroof is a sunroof made of glass. The problem is, the distinction is becoming lost as more and more people use it incorrectly, Most people today just consider any sort of hole in the roof a sunroof. But in the strictest sense, sunroof=metal, moonroof=glass.
Read more: http://wiki.answers.com/Q/Is_there_a...#ixzz1IxVjzALo
