1996 E320 Climate Control Issue
Thread Starter
Junior Member
Joined: Jul 2011
Posts: 18
Likes: 0
From: Cranberry Township, PA, USA
W210 E320
1996 E320 Climate Control Issue
Hi there -
I have a 1996 E320 with the digital climate control system (I am in the US). Last night, the climate control system began acting strange. After setting my desired temperature, the temp selected started going down, on its own, all the way to "LO". Also, the recirculate light was flashing. I tried shutting the car off, restarting it, but that did not fix the issue.
Is there a way to simply reset the climate control console? - or any other ideas on what is causing the problem?
Thank you in advance for your assistance. All the best,
Ken
I have a 1996 E320 with the digital climate control system (I am in the US). Last night, the climate control system began acting strange. After setting my desired temperature, the temp selected started going down, on its own, all the way to "LO". Also, the recirculate light was flashing. I tried shutting the car off, restarting it, but that did not fix the issue.
Is there a way to simply reset the climate control console? - or any other ideas on what is causing the problem?
Thank you in advance for your assistance. All the best,
Ken
MBWorld Fanatic!
Joined: Oct 2007
Posts: 1,564
Likes: 19
From: SoCal
98 Brilliant Silver E320 Wagon
First part sounds normal. If the car was turned off when it was hot out and the CCU was set for auto, then when starting the car at a later time when it's cooler the CCU will adjust by reducing the fan speed. It's part of the 'automatic' system.
No built-in reset that I know of but you can pull the unit from the dash and disconnect the power if you have the 'radio keys' needed. You can also disconnect the battery but be sure to have your radio code (if needed) and procedure to resync windows and sunroof.
No built-in reset that I know of but you can pull the unit from the dash and disconnect the power if you have the 'radio keys' needed. You can also disconnect the battery but be sure to have your radio code (if needed) and procedure to resync windows and sunroof.
Thread Starter
Junior Member
Joined: Jul 2011
Posts: 18
Likes: 0
From: Cranberry Township, PA, USA
W210 E320
First part sounds normal. If the car was turned off when it was hot out and the CCU was set for auto, then when starting the car at a later time when it's cooler the CCU will adjust by reducing the fan speed. It's part of the 'automatic' system.
No built-in reset that I know of but you can pull the unit from the dash and disconnect the power if you have the 'radio keys' needed. You can also disconnect the battery but be sure to have your radio code (if needed) and procedure to resync windows and sunroof.
No built-in reset that I know of but you can pull the unit from the dash and disconnect the power if you have the 'radio keys' needed. You can also disconnect the battery but be sure to have your radio code (if needed) and procedure to resync windows and sunroof.
Thread Starter
Junior Member
Joined: Jul 2011
Posts: 18
Likes: 0
From: Cranberry Township, PA, USA
W210 E320
Any other ideas?
Ken
MBWorld Fanatic!
Joined: Oct 2007
Posts: 1,564
Likes: 19
From: SoCal
98 Brilliant Silver E320 Wagon
Maybe a flakey temperature sensor?
These CAN bus cars use a microcontroller which is like dedicated PC to control most electronics in the car. Disconnecting the battery is a way of 'resetting' the computer. It usually doesn't help but trying it doesn't cost much. If you do, wait about 15min before reconnecting.
These CAN bus cars use a microcontroller which is like dedicated PC to control most electronics in the car. Disconnecting the battery is a way of 'resetting' the computer. It usually doesn't help but trying it doesn't cost much. If you do, wait about 15min before reconnecting.
Thread Starter
Junior Member
Joined: Jul 2011
Posts: 18
Likes: 0
From: Cranberry Township, PA, USA
W210 E320
Maybe a flakey temperature sensor?
These CAN bus cars use a microcontroller which is like dedicated PC to control most electronics in the car. Disconnecting the battery is a way of 'resetting' the computer. It usually doesn't help but trying it doesn't cost much. If you do, wait about 15min before reconnecting.
These CAN bus cars use a microcontroller which is like dedicated PC to control most electronics in the car. Disconnecting the battery is a way of 'resetting' the computer. It usually doesn't help but trying it doesn't cost much. If you do, wait about 15min before reconnecting.
Ken
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Thread Starter
Junior Member
Joined: Jul 2011
Posts: 18
Likes: 0
From: Cranberry Township, PA, USA
W210 E320
Hi Folks -
I took a video of the climate control mystery. Can you watch it and let me know your thoughts? Thank you so much!
http://youtu.be/S7vFtl3ryYs
I took a video of the climate control mystery. Can you watch it and let me know your thoughts? Thank you so much!
http://youtu.be/S7vFtl3ryYs
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MBWorld Fanatic!
Joined: Oct 2007
Posts: 1,564
Likes: 19
From: SoCal
98 Brilliant Silver E320 Wagon
I think he means what happens when you press the EC button.
Try running the built-in diagnostics and post the values and any error messages.
http://www.eclassbenz.com/node/27
Try running the built-in diagnostics and post the values and any error messages.
http://www.eclassbenz.com/node/27
