Air conditioning (A/C) problem
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Junior Member
Joined: Oct 2013
Posts: 64
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C207 - 2011 E550 Coupe
Air conditioning (A/C) problem
Hi,
I have just noticed today that my AC isn't operating properly. It is set to 'LOW' on both the driver and passenger side, but is blowing warm/hot air on the driver's side and cool air on the passenger side and rear. After doing a bit of searching, it looks like the most common cause is low refrigerant or issues with the duovalve (other forums and different models). Is there a DIY for the 2011 E550 A/C recharge? Is there a specific product or brand I should use?
Thanks in advance for any helpful advice
I have just noticed today that my AC isn't operating properly. It is set to 'LOW' on both the driver and passenger side, but is blowing warm/hot air on the driver's side and cool air on the passenger side and rear. After doing a bit of searching, it looks like the most common cause is low refrigerant or issues with the duovalve (other forums and different models). Is there a DIY for the 2011 E550 A/C recharge? Is there a specific product or brand I should use?
Thanks in advance for any helpful advice
Out Of Control!!
Joined: Jul 2003
Posts: 15,901
Likes: 4,630
From: North Scottsdale, AZ
'71 Pinto
Attachments may help. Refrigerator oil: https://bevo.mercedes-benz.com/bevolisten/362.0_en.html
Thread Starter
Junior Member
Joined: Oct 2013
Posts: 64
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C207 - 2011 E550 Coupe
Very helpful, thanks!
Looks like 590g is the filling capacity of the refrigerant, but I'm guessing that's from an entire system flush. This is looking to be much more involved than I originally thought lol. I was just thinking I could refill it with r134a or AC PRO via the low pressure port
Looks like 590g is the filling capacity of the refrigerant, but I'm guessing that's from an entire system flush. This is looking to be much more involved than I originally thought lol. I was just thinking I could refill it with r134a or AC PRO via the low pressure port
Super Member
Joined: Jul 2010
Posts: 744
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From: Houston, TX
2014 E550 Coupe and 2010 E350 Sedan
Hopefully recharging the system works for you, but my sedan recently had this issue. The problem ended up being a hose had failed somewhere (I don't know much about the location of all the components and hoses), so the cold air wasn't getting to the passenger side.
Thread Starter
Junior Member
Joined: Oct 2013
Posts: 64
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C207 - 2011 E550 Coupe
Ok, so AC Pro got delivered. I went ahead and refilled it, and while it definitely cooled the driver's side down, it's not as cold as the passenger side, BUT, it does seem the entire system has gotten colder. Before the recharge, the passenger side was cool/coldish and the driver's side was warm. Now after the charge, the passenger side is very cold and the driver's side is cool.
One thing that is not very good about the AC Pro, is that the needle didn't seem to move as I was charging, so I didn't charge for very long for fear of overcharging the system. Still though, it definitely DID help.
Thanks for the replies
One thing that is not very good about the AC Pro, is that the needle didn't seem to move as I was charging, so I didn't charge for very long for fear of overcharging the system. Still though, it definitely DID help.
Thanks for the replies
