E-Class (W211) 2003-2009

A/Coff switch

Old Feb 26, 2016 | 05:20 PM
  #1  
alexqkama's Avatar
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From: DFW
2006 C230 with 139k and 2005 C240 4matic
A/Coff switch

Hello
I am a little embarrassed to ask a question like the following but I think Germans have their way to be different. First their weather channel shows the oceans and seas on the globe imagery with the color of the land, and the land is shown with the color of the oceans. Second, the cruise control in the cluster illuminates from the highest speed point and on NOT illuminate the area from 0 to 70 for example.
Now the embarrassing question is that after replacing the compressor the a/c barely blow 10% cold air and that is when I turn the switch off (the red light is off on the switch and not visible). When the switch A/C off, the red light is off, Does that mean the A/C is on? confusing!!!

Last edited by alexqkama; Feb 26, 2016 at 05:51 PM.
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Old Feb 26, 2016 | 05:49 PM
  #2  
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W204 C63 AMG, W212 E250 CGI, C207 E250 CGI
light on, means it on. lets get it on! lol
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Old Feb 26, 2016 | 06:57 PM
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From: In the Shadow of the Tetons
2013 ML350 Bluetec
On my car when the red light is on it means exactly what the switch says: AC off. It also turns off the auxiliary climate control heater.
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Old Feb 26, 2016 | 07:50 PM
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1922 Ford Model T / no OBD
I googled "DFW" and the first hit was Dallas, but that is a lottery.
So not having confirmation what model of car you have, we can read crystal ball and that is about it.
AC on MB is confusing. In previous years MB did not have AC on/off switch, but it did have "Economy" switch what did exactly opposite to what AC switch would do.
So how about a picture of what you have?
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Old Feb 26, 2016 | 08:00 PM
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2003 E320?
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Old Feb 26, 2016 | 08:12 PM
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From: In the Shadow of the Tetons
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Originally Posted by beejAMG
2003 E320?
A reasonable guess
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Old Feb 26, 2016 | 08:19 PM
  #7  
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Yes...and it also say on OPs signature.
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Old Feb 26, 2016 | 08:21 PM
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From: In the Shadow of the Tetons
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Hence the word "reasonable" instead of the phrase "wild-***"
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Old Feb 26, 2016 | 08:26 PM
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1922 Ford Model T / no OBD
So now we can turn the topic into "wild-***" dispute, while the OP will not confirm it this way, or the other.
Sure German are strange people. They drive in kilometers, read temperature in C, buy fuel by liters, beer by kegs and 180 kph is slow lane speed.
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Old Feb 26, 2016 | 10:18 PM
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Im bored
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Old Feb 26, 2016 | 11:06 PM
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From: In the Shadow of the Tetons
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Originally Posted by kajtek1
So now we can turn the topic into "wild-***" dispute, while the OP will not confirm it this way, or the other.
Sure German are strange people. They drive in kilometers, read temperature in C, buy fuel by liters, beer by kegs and 180 kph is slow lane speed.
The OP is nothing if not consistent. He'll ask a question then not bother responding to responses, then ask the same question (or closely related) in another thread.

It's a 2003 E320 in Dallas/Fort Worth that's been through a flood, if his posts and avatar sig are to be taken seriously. My WAG is that electronics don't like to be flooded, his is having issues because of it, and his "general mechanic" is as over his head with this car as the water was over the Benz. But I could be mistaken, and I welcome being enlightened by the OP...

alexqkama, here's the owner's manual for your car; it might help with your questions:
http://www.mbusa.com/mercedes/servic...&class=E-Class

Last edited by rapidoxidation; Feb 26, 2016 at 11:10 PM.
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Old Feb 26, 2016 | 11:23 PM
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2006 C230 with 139k and 2005 C240 4matic
Sorry my friend I was a little busy but you mentioned that the red light is on it means exactly what the switch says: AC off. It seems to me that Germans are playing with our minds. Why A/C off not A/C on on the switch like all cars.
The car is flood car and I have replaced many modules. everything works except the AM radio, the RF remote and draw in the battery.
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Old Feb 27, 2016 | 12:10 AM
  #13  
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I've noticed that the more luxury oriented a car is, the less the driver needs to tend to things. You want cold air, just turn the dial to cold - no need to switch on the A/C because the car will do it for you. A Chevy truck I had that had automatic climate control was the same way: If you want to force the AC compressor to be off, you had to switch it off - default was ON.

I'm just learning about these cars myself, so take what I'm about to type as words from a n00b: There's a battery control module in the trunk, just below the floor. If my limited understanding of the module is correct, it supplies the charge current to the main and to the auxiliary (brake system) battery while at the same time keeping them isolated from one another. If you've got issues with a battery getting pulled down, maybe start there.

The more I learn about these cars, the more I'm sure that getting the proper diagnostic computer is essential to be able to accurately figure out what is happening. STAR tools are available on Ebay for less than $1,000. if your mechanic doesn't have something very comparable, you're just tossing money away...

Hopefully someone with more knowledge and experience will pipe up in this thread, but I suspect that the flooding, even if it was only up to the seat cushions, will be a serious issue for the car as long as you (or anyone else) owns it. If something isn't cooked immediately, then corrosion is the ticking time bomb.
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Old Feb 27, 2016 | 12:30 AM
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1922 Ford Model T / no OBD
The truth is that W211 still have lot of dark pages.
Just last week we've got first DIY on SBC pump replacement.
Took 13 years....
AC on those cars has its own program as well. The compressor will come on even in freezing temperatures to prevent glass fogging and the truth is that MB is not disclosing the programs, so we have to do it hard way.
I let the automatic climate control do its magic on W123. The car come on the road over 30 years ago...
On W211 I am fortunate to have climatronic with my 4-zone, so I can troubleshoot sensors while driving, but guys with no LCD have to do it the hard way.
So getting SD from ebay might be just the begging of very hard and long journey.
Did I mention that SD have advanced options in German?
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Old Feb 27, 2016 | 12:42 AM
  #15  
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2006 C230 with 139k and 2005 C240 4matic
I have had replaced the battery control module with one that belongs to 2006 E500 not E320. I wounder now since you mentioned it if this is the culprit. Does it mean also that the module is responsible for applying the ABS sometimes when driving real slow, the car start jerking back and forth and seems like braking down.
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Old Feb 29, 2016 | 09:10 PM
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W211 - 2003
The jerking could just be an awkward shift which some cars tend to do when driving at slow speeds... but it's possible that the battery controls between the E320 and E500 could be different, particularly different model years (albeit same body style, I'm sure there are some equipment?)
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