A/C problem ML 270
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Joined: Jul 2013
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ML 270
A/C problem ML 270
Hello!
I have problems with my AC on my ML 270 Cdi from 01.
The ac compressor will not engage.
I can turn the clutch freely with my hands without any problems.
I have tried to manually activate the comprssor when the engine is running, but it will not start. When the engine ist not running i hear a "click" when i try to activate the comprssor manually.
I have checed the gas and this is ok
I also have a foult code B1108 (M13 water heating exchange pump)
Is it correct that i can turn the clutch so freely??
And why doesn`t the clutch activate - it seems it is ok when i hearing a "click" when the engine is not running
The comprsseor is a Denso 7SEU16C.
Hoping for some good answers here
I have problems with my AC on my ML 270 Cdi from 01.
The ac compressor will not engage.
I can turn the clutch freely with my hands without any problems.
I have tried to manually activate the comprssor when the engine is running, but it will not start. When the engine ist not running i hear a "click" when i try to activate the comprssor manually.
I have checed the gas and this is ok
I also have a foult code B1108 (M13 water heating exchange pump)
Is it correct that i can turn the clutch so freely??
And why doesn`t the clutch activate - it seems it is ok when i hearing a "click" when the engine is not running
The comprsseor is a Denso 7SEU16C.
Hoping for some good answers here
MBWorld Fanatic!
Joined: Oct 2011
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From: Bronx, N.Y.
2002 ML 320 & 2006 ML500
I forgot to include the attachment, but it is now included in the other post.
If that is the AC controls that you have then you do not have an 2001. You have a 2002.
Europeans always make this mistake when registering the cars. The production date is not the year of you vehicle. 2002 vehicles came out in Sept. of 2001.
Thread Starter
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ML 270
Yes that is the one i have
But my ML is first time registerd in may 01 and I have checked teh vin nr
an the 11 number is 1, but if you say it is a 02 it is ok for me.
But can you tell me more about my problem with tha A/C?
But my ML is first time registerd in may 01 and I have checked teh vin nr
an the 11 number is 1, but if you say it is a 02 it is ok for me.
But can you tell me more about my problem with tha A/C?
MBWorld Fanatic!
Joined: Oct 2011
Posts: 7,107
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From: Bronx, N.Y.
2002 ML 320 & 2006 ML500
I'm not familiar with Euro. vin #'s, but the 10th digit (not counting the M/B trademark) is the year of the vehicle.
The circuit board in the AAC Push Button controls is probably burned (as pictured below). The cause of this is that the Coolant Circulation Pump has seized.
Turn the key to pos.#2 and with had hand feel if the pump is working. If it isn't then remove the electrical connector and order a new Circulation Pump.
Remove the AC controller from the dash and with a T7 torx screwdriver take the covers off and check for a burned board. If so you will have to get that also.
The circuit board in the AAC Push Button controls is probably burned (as pictured below). The cause of this is that the Coolant Circulation Pump has seized.
Turn the key to pos.#2 and with had hand feel if the pump is working. If it isn't then remove the electrical connector and order a new Circulation Pump.
Remove the AC controller from the dash and with a T7 torx screwdriver take the covers off and check for a burned board. If so you will have to get that also.
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Thread Starter
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ML 270
I'm not familiar with Euro. vin #'s, but the 10th digit (not counting the M/B trademark) is the year of the vehicle.
The circuit board in the AAC Push Button controls is probably burned (as pictured below). The cause of this is that the Coolant Circulation Pump has seized.
Turn the key to pos.#2 and with had hand feel if the pump is working. If it isn't then remove the electrical connector and order a new Circulation Pump.
Remove the AC controller from the dash and with a T7 torx screwdriver take the covers off and check for a burned board. If so you will have to get that also.
The circuit board in the AAC Push Button controls is probably burned (as pictured below). The cause of this is that the Coolant Circulation Pump has seized.
Turn the key to pos.#2 and with had hand feel if the pump is working. If it isn't then remove the electrical connector and order a new Circulation Pump.
Remove the AC controller from the dash and with a T7 torx screwdriver take the covers off and check for a burned board. If so you will have to get that also.
I have now got the pump working, but the A/C will not work.
It works like Maj. Dundee says -> when I set the key to pos. 2 it start to work and when i I turn the key to pos 0 it stopps.
I have not yet checked the control panel -> is that nesesary now when thw pump is working? or is it another thing that are not working as it should?
Other things I can check before i demont the control panel?
(I need some spesiel tools to demont the radio/ Navigation to get to the control panel I think??)
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Thread Starter
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ML 270
They took all the gas out and put it back agin and they told me that the gas was ok.
I have checked with another MB (not a ML but same compressor) and on that one the comprssor runs all the time, with or with out the A/C system activated and the comprssor is a lot harder to turn when the engine is not running -> mine is very easy to turn when the engine is not running.
Could it be a problem with the compressor?
MBWorld Fanatic!
Joined: Oct 2011
Posts: 7,107
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From: Bronx, N.Y.
2002 ML 320 & 2006 ML500
OK, remove both covers to the underhood fuse/relay box and then the three additional additional screws and pull up the fuse/relay module. Then turn it upside down onto a folder towel.
Locate connector X22 and wire #9. On one side of the connector the wire color will be PINK and on the other side it will be BROWN/VIOLET.
Using a DVOM or test light, have someone push the A/C button while you check for 12v at the PINK wire and then at the BRN/VIO wire.
What are the results?
Locate connector X22 and wire #9. On one side of the connector the wire color will be PINK and on the other side it will be BROWN/VIOLET.
Using a DVOM or test light, have someone push the A/C button while you check for 12v at the PINK wire and then at the BRN/VIO wire.
What are the results?
Newbie
Joined: Jan 2015
Posts: 1
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mercedes-benz
Hello! I have a Mercedes 270 2002 ml. I got this problem with my aircondition. It blows out air, but not cold air. So how can i fiz the problem easily?
And i also wonder, how do you disassemble the dashboard?
And i also wonder, how do you disassemble the dashboard?
Super Member
Joined: May 2013
Posts: 504
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From: Harare, Zimbabwe
2003 ML55,2007 ML63
frjoramo your cars delivery date is 23.09.2002. Your car is a 2003 model. In May 2001 your car didn't exist.......
With Euro vins 10th digit is 1 or 2. 1 means left hand drive & 2 right hand drive. The 11th digit is the manufacturing plant. In your case your car is US made. With Euro vins it is impossible to tell the year by looking at the vin#. One needs EPC Data card to get the year of manufacture. I have included your data card.
With Euro vins 10th digit is 1 or 2. 1 means left hand drive & 2 right hand drive. The 11th digit is the manufacturing plant. In your case your car is US made. With Euro vins it is impossible to tell the year by looking at the vin#. One needs EPC Data card to get the year of manufacture. I have included your data card.
