help on recharging ac 430 ml - Mercedes-Benz Forum
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#1 (permalink) Old 09-07-2004, 03:06 PM
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help on recharging ac 430 ml

any one know how to recharge the ac, My ac is starting to blow cool are not cold air. my car has 80k miles and it is 1999. if anyone can help i would apreciate it.
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#2 (permalink) Old 09-07-2004, 03:15 PM
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RE: help on recharging ac 430 ml

Simple procedure...The inlet is on the battery side of the motor near the firewall, you will only utilize the bigger tube, as it will note on the freon bottle. Connect the bottle with your car on and AC on full. It's that easy!
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#3 (permalink) Old 09-07-2004, 03:48 PM
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RE: help on recharging ac 430 ml

where can i get this freon and do u have procedure that i can follow with detail. i heard that freon is illegal and that we are using a new system. i dont know if the ml are using the new system or not can anyone help, thanks ccorley
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#4 (permalink) Old 09-07-2004, 04:25 PM
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RE: help on recharging ac 430 ml

R134, which your system uses can be purchased from any auto parts store or even Wal-mart, it's very very cheap. About 4.00 a can. If your system is empty you will probably need about 2 cans of freon, also 1 can of the sealer should do it. The sealer will seal leaks, so I would suggest you put a can of that in it as well. Follow the instructions on the can, it's very simple. Good Luck!
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#5 (permalink) Old 09-07-2004, 05:19 PM
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RE: help on recharging ac 430 ml

You just can't connect R134a to low pressure port (there is also high pressure port) and empty the can. You have to know what's the current pressure on low and high, and what are the right pressures.

First thing is to make sure you do have low in refrig. You need to check low pressure switch, compressor clutch, where are the leaks, etc.

There is more to it than just stick a can. If you invert the can during the charging process refrig fluid (vs. gas) can get into the compressor and you could damage it, do you or don't you add compressor oil, etc.

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#6 (permalink) Old 09-08-2004, 06:00 AM
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RE: help on recharging ac 430 ml

Given the cost of the compressor, drier etc, go to the dealer, spend the $80.00 and get them to do it. Oh and save the envornment too.
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#7 (permalink) Old 09-08-2004, 04:40 PM
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RE: help on recharging ac 430 ml

or, you can buy the can of stuff with a pressure gauge built in to the hose. 20 bucks at wally-world. and still do it yourself.
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#8 (permalink) Old 09-08-2004, 06:55 PM
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RE: help on recharging ac 430 ml

Quote:
sthu - 9/7/2004 7:19 PM

You just can't connect R134a to low pressure port (there is also high pressure port) and empty the can. You have to know what's the current pressure on low and high, and what are the right pressures.

First thing is to make sure you do have low in refrig. You need to check low pressure switch, compressor clutch, where are the leaks, etc.

There is more to it than just stick a can. If you invert the can during the charging process refrig fluid (vs. gas) can get into the compressor and you could damage it, do you or don't you add compressor oil, etc.
This is good advice. I have done A/C on several of my cars and it’s not that hard if all you need to do is replace parts, and then vacuum and charge system. You do need hoses with gauges, vacuum pump and the knowledge to use them which can be acquired by reading.


Check this link:

http://www.ackits.com/forum/index.cfm
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#9 (permalink) Old 09-08-2004, 08:04 PM
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RE: help on recharging ac 430 ml

I just asked the same question for my ml320 - but the ac site that you linked to I found very confusing.
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#10 (permalink) Old 09-09-2004, 08:11 AM
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RE: help on recharging ac 430 ml

First off,

Purchase the something with a guage;

http://www.partsamerica.com/PartDetails.asp?SourceArea=&SourcePage=SEARCHRESUL TS&MfrCode=IDN&MfrPartNumber=MAC134&CategoryCode=3 571

On the ML, I have the same year you have, the cap on the Low side of the AC will have an "L" on it, and the same for the high side (you don't want to force AC into the high side).

Following these instructions found at this link;

http://www.partsamerica.com/product_images/related_docs/mac1instructions.pd

If the second link doesn't work, the instructions link is on the lower right hand corner of the 1st link.

and Good Luck,

Dennis

If you don't know where you want to go....
"Then it doesn't much matter how you get there"

2004 Dodge Ram 1500 4X4
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