Safe to add 12 ounces of freon without gauge?
Senior Member
Joined: Jul 2011
Posts: 426
Likes: 4
From: Sacramento, CA
2005 Granite Gray C55
Honestly, I would take it to a shop. You won't know exactly how much freon is precisely in the system and thus leading into complications later on.
By all means if you have a machine w/ a vacuum go for it. The shop I went to had a digital display on how much existing freon was in the system after recovering all of it. Then they proceeded to recharge it all the way from an empty system. I believe ours hold .87 or .90 give or take.
Either way, it cost a little more but it is the way to prevent any complications.
By all means if you have a machine w/ a vacuum go for it. The shop I went to had a digital display on how much existing freon was in the system after recovering all of it. Then they proceeded to recharge it all the way from an empty system. I believe ours hold .87 or .90 give or take.
Either way, it cost a little more but it is the way to prevent any complications.
Member
Joined: Oct 2015
Posts: 76
Likes: 3
C55 AMG
I wouldn't. You might have a leak somewhere and adding the freon could be a waste of time. It's always best to get it on a vacuum to make sure there's no moisture/leaks in the system.
If your going to diy without a vacuum go buy one of the canisters of freon with a gauge. Last thing you want to do is replace a/c gaskets if you pop one
If your going to diy without a vacuum go buy one of the canisters of freon with a gauge. Last thing you want to do is replace a/c gaskets if you pop one
MBWorld Fanatic!
Joined: Jan 2014
Posts: 3,966
Likes: 1,315
From: Republic of Texas
'99 and '05 E55 AMG
Take it to a shop, have them remove all refrigerant, check to ensure it holds vacuum, then charge with the amount of refrigerant shown in the attached screenshot. The measurements are in grams.
Last edited by bbirdwell; Aug 10, 2016 at 11:18 AM. Reason: typo
