C32 AMG, C55 AMG (W203) 2001 - 2007

Safe to add 12 ounces of freon without gauge?

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Old 08-08-2016, 06:02 PM
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C55 AMG
Safe to add 12 ounces of freon without gauge?

These Mississippi summers are something fierce.
Old 08-09-2016, 10:46 AM
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bone stock E55 AMG
moved to W203 AMG forum...
Old 08-09-2016, 01:36 PM
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you can rent gauges from autozone for free.
Old 08-09-2016, 02:34 PM
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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.
Old 08-09-2016, 03:55 PM
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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
Old 08-09-2016, 05:11 PM
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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.
Attached Thumbnails Safe to add 12 ounces of freon without gauge?-quantity.jpg  

Last edited by bbirdwell; 08-10-2016 at 11:18 AM. Reason: typo
Old 08-10-2016, 12:07 AM
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Thanks

Thanks to all responses, glad I waited to see what y'all thought.

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