W211 A/C Help
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Joined: Jun 2019
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W211 E350
W211 A/C Help
I was given a used W211 from my grandfather. The A/C is not working (blowing hot air) and I had it taken to Firestone for diagnostics. I was told that my compressor was fried. They quoted me $2500 for new compressor, condensor, drier, and expansion valve. I have all those parts brand new already. I figured i would R&R the compressor myself. I was just wondering if there was anyone with any tips or write ups so I can do this myself. I have access to WIS(?) but its on my laptop at my grandfather's house.
Any help would be appreciated. I'm mainly wondering how hard of a job it is and how to add compressor oil . I live in Texas, driving with no A/C is agonizing .
Thanks!
Any help would be appreciated. I'm mainly wondering how hard of a job it is and how to add compressor oil . I live in Texas, driving with no A/C is agonizing .
Thanks!
MBWorld Fanatic!
Joined: Jul 2012
Posts: 1,556
Likes: 15
From: Canada
07 E63 + 07 CLK63CAB
Does the compressor turn on and off when the ac is turn on inside the cab
My E63 compressor apparently is always on, according to Mercedes
But if you need to remove the compressor make sure to have it evacuated ( complete )
Mine was basically remove the fan from behind the rad
Remove the serpentine belt
Unbolt the compressor from the block
Remove the ac freon lines from the compressor
Wiggle the compressor out and up between the fan and the engine block
Take care to not touch the rad
Replace new compressor back down the same way
Reconnect the hoses and bolt to block
reinstall all components
Take to AC shop for evac then they will refill with freon and the proper amount of oil
May need a reset from Mercedes 2 minutes to tell the compressor to start
Good Luck
My E63 compressor apparently is always on, according to Mercedes
But if you need to remove the compressor make sure to have it evacuated ( complete )
Mine was basically remove the fan from behind the rad
Remove the serpentine belt
Unbolt the compressor from the block
Remove the ac freon lines from the compressor
Wiggle the compressor out and up between the fan and the engine block
Take care to not touch the rad
Replace new compressor back down the same way
Reconnect the hoses and bolt to block
reinstall all components
Take to AC shop for evac then they will refill with freon and the proper amount of oil
May need a reset from Mercedes 2 minutes to tell the compressor to start
Good Luck
Thread Starter
Newbie
Joined: Jun 2019
Posts: 12
Likes: 0
W211 E350
Does the compressor turn on and off when the ac is turn on inside the cab
My E63 compressor apparently is always on, according to Mercedes
But if you need to remove the compressor make sure to have it evacuated ( complete )
Mine was basically remove the fan from behind the rad
Remove the serpentine belt
Unbolt the compressor from the block
Remove the ac freon lines from the compressor
Wiggle the compressor out and up between the fan and the engine block
Take care to not touch the rad
Replace new compressor back down the same way
Reconnect the hoses and bolt to block
reinstall all components
Take to AC shop for evac then they will refill with freon and the proper amount of oil
May need a reset from Mercedes 2 minutes to tell the compressor to start
Good Luck
My E63 compressor apparently is always on, according to Mercedes
But if you need to remove the compressor make sure to have it evacuated ( complete )
Mine was basically remove the fan from behind the rad
Remove the serpentine belt
Unbolt the compressor from the block
Remove the ac freon lines from the compressor
Wiggle the compressor out and up between the fan and the engine block
Take care to not touch the rad
Replace new compressor back down the same way
Reconnect the hoses and bolt to block
reinstall all components
Take to AC shop for evac then they will refill with freon and the proper amount of oil
May need a reset from Mercedes 2 minutes to tell the compressor to start
Good Luck
It seems my compressor is always on .. When i dont have the AC on, the clutch still spins. Is this due to it being a variable clutch?? or whatever?
What about tools and jacks? Do i need any special tools?
And is the reset from Mercedes MANDATORY??
Also this was my plan :
Remove Compressor (let Freon leak into the air or whatever)
Replace Compressor and O Rings
Replace Drier
Replace Expansion valve
Maybe replace Condenser if not too difficult
Vacuum for 30mins to 1hr
Drive to A/C shop for recharge and PAG oil
Last edited by Cali Prynce; Jun 20, 2019 at 01:38 PM. Reason: add
MBWorld Fanatic!
Joined: Jul 2012
Posts: 1,556
Likes: 15
From: Canada
07 E63 + 07 CLK63CAB
On the AMG the compressor runs all the time
Not sure about yours
But the freon should not be overcharged
This will cause a fault and for sure the system will not run
Go to a good AC service center, have them check it out and if it is charged then there are no leaks
the compressor if have normal should I think turn on and off when actuated, let them tell you the answer
But if you are replacing the comp then have them evac the system, go home change out the comp then return to the shop and have them evac to vacuum then recharge with oil and freon to proper values, usually on the hood is a plate or sticker
The reset mine needed, but 2 minutes it was blowing cold air after the reset or fault was removed
No special tools maybe jack and some stands, remove under panel and gently remove the fan shroud etc etc
Not sure about yours
But the freon should not be overcharged
This will cause a fault and for sure the system will not run
Go to a good AC service center, have them check it out and if it is charged then there are no leaks
the compressor if have normal should I think turn on and off when actuated, let them tell you the answer
But if you are replacing the comp then have them evac the system, go home change out the comp then return to the shop and have them evac to vacuum then recharge with oil and freon to proper values, usually on the hood is a plate or sticker
The reset mine needed, but 2 minutes it was blowing cold air after the reset or fault was removed
No special tools maybe jack and some stands, remove under panel and gently remove the fan shroud etc etc
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MBWorld Fanatic!
Joined: Jan 2014
Posts: 3,969
Likes: 1,317
From: Republic of Texas
'99 and '05 E55 AMG
It's called a "wobble plate" or "swash plate" compressor.
R134a capacity is 0.950kg.
Oil ISO 46 capacity 120g total. Quantity less if only replacing specific parts; e.g. condenser 30 cubic cm, evaporator 40 cubic cm, etc. AC shop should have this information.
R134a capacity is 0.950kg.
Oil ISO 46 capacity 120g total. Quantity less if only replacing specific parts; e.g. condenser 30 cubic cm, evaporator 40 cubic cm, etc. AC shop should have this information.
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MBWorld Fanatic!
Joined: Apr 2004
Posts: 1,492
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From: Canada
2004 E500 / 2001 C240
I had the same issue about a month ago. I took it to the shop and they wanted to replace everything. I asked them to charge the system and it fixed there being no ac.
They also included some dye in the system to see if there were any leaks and there is none.
They also included some dye in the system to see if there were any leaks and there is none.
MBWorld Fanatic!
Joined: Jan 2009
Posts: 9,225
Likes: 1,798
From: V E G A S
1922 Ford Model T / no OBD
Take about 2 minutes to do proper troubleshooting. If you don't have climatronic with REC button, you will need a scanner and read the notes, when to do 2 readouts.
Universal procedure at http://www.mercedesmedic.com/ac-air-...le-codes-list/
Universal procedure at http://www.mercedesmedic.com/ac-air-...le-codes-list/
Thread Starter
Newbie
Joined: Jun 2019
Posts: 12
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W211 E350
Ok so i went ahead and bought ICarsofti980 so I can have so actual values to troubleshoot.
My A/C light is not stuck on . Some guy i knows did a little troubleshooting and he was able to get it to blow cool for about an hour until i started driving. If it blew cool, does that rule out the compressor??
another thing, my ambient air temperature reading is 185F . My whole wire is GONE . I already have sensor but no wire to trace back... Would this be the source of my problem??
My A/C light is not stuck on . Some guy i knows did a little troubleshooting and he was able to get it to blow cool for about an hour until i started driving. If it blew cool, does that rule out the compressor??
another thing, my ambient air temperature reading is 185F . My whole wire is GONE . I already have sensor but no wire to trace back... Would this be the source of my problem??
Thread Starter
Newbie
Joined: Jun 2019
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W211 E350
MBWorld Fanatic!
Joined: Jan 2009
Posts: 9,225
Likes: 1,798
From: V E G A S
1922 Ford Model T / no OBD
Hard to tell without seeing, but what could happen to original wire?
Good idea is to find access to the same MY car and check where the wire goes in first place.
Replacing whole harness might be humongous job.
Good idea is to find access to the same MY car and check where the wire goes in first place.
Replacing whole harness might be humongous job.
Thread Starter
Newbie
Joined: Jun 2019
Posts: 12
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W211 E350
Would buying the i980 scanner tell me which sensors or what is keeping my AC from blowing cold?
MBWorld Fanatic!
Joined: Jan 2009
Posts: 9,225
Likes: 1,798
From: V E G A S
1922 Ford Model T / no OBD
Maybe owner of i980 can answer? My iCarsoft MB II reads AC sensors just fine. Reading the sensors still require some interpretations and that is where forum can help. Sometimes car will display code, (that needs to b cleared before future troubleshooting) sometimes not.
Newbie
Joined: Apr 2024
Posts: 1
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2006 W211 E350 4MATIC Sedan
compressor reset: Can I do it with BlueDriver or by pushing dash buttons?
On the AMG the compressor runs all the time
Not sure about yours
But the freon should not be overcharged
This will cause a fault and for sure the system will not run
Go to a good AC service center, have them check it out and if it is charged then there are no leaks
the compressor if have normal should I think turn on and off when actuated, let them tell you the answer
But if you are replacing the comp then have them evac the system, go home change out the comp then return to the shop and have them evac to vacuum then recharge with oil and freon to proper values, usually on the hood is a plate or sticker
The reset mine needed, but 2 minutes it was blowing cold air after the reset or fault was removed
No special tools maybe jack and some stands, remove under panel and gently remove the fan shroud etc etc
Not sure about yours
But the freon should not be overcharged
This will cause a fault and for sure the system will not run
Go to a good AC service center, have them check it out and if it is charged then there are no leaks
the compressor if have normal should I think turn on and off when actuated, let them tell you the answer
But if you are replacing the comp then have them evac the system, go home change out the comp then return to the shop and have them evac to vacuum then recharge with oil and freon to proper values, usually on the hood is a plate or sticker
The reset mine needed, but 2 minutes it was blowing cold air after the reset or fault was removed
No special tools maybe jack and some stands, remove under panel and gently remove the fan shroud etc etc
