Question about 1998 Mercedes-Benz C-Class

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Need to find the port to charge my a/c

I need to find the port to charge my refrigerant with R-134a. Can you tell me where the port is?

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  • 408 Answers

Hi,open your hood ,near your windscreen washer reservoir,other one is cover with plastic screen,remove the cover,look for big plastic cup inline with your aircon hose

Posted on Apr 14, 2009

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What kind of ac coolant does it have 134a or r 12 and where is the low pressure port for the ac located


Depends on the year. Cars in the early 90's used R12. Anything later uses R134a. The size of the charge ports will define the R134a port. An adapter is needed to fit on the charging hose. R12 requires no such adapter. Ther charging label under the hood will tell you what refrigerant is needed too. Since you failed to give enough information on what make and model car you have, a general answer for the location of the low pressure port will be given. On the compressor, the larger diameter hose connection is the low side. Connect there, or look for the drier/accumulator (Large diameter silver container near the firewall). Connect there. You will need to access the AC information label under the hood to determine how much freon to add to the system.

Mar 12, 2016 | AC Cars & Trucks

1 Answer

I have a older esa3060 haier ac unit and I would like to know if I could recharge it with 134a is there evern ports for charging on it


sorry but no you can not add 134A to a home unit that is for cars and trucks if it has never been charged then there will be no ports they need to be added by an air conditioner service man

May 31, 2015 | AC Cars & Trucks

1 Answer

What type of refrigerant goes in chevrolet g 20


You should have a tag that tells you this . But it takes R-12 refrigerant. Hope this helped you out and good luck finding R-12 to put in it! You should convert to R-134a. It's easy and you dont have to change anything but the charge ports.

Jul 24, 2011 | 1992 Chevrolet G20

1 Answer

Where is low side port to connect charge kit on a 1998 Buick Century Custom? Also, to be sure what type of refrigerant should be used? (R-134a) or different Thank You, Brandon


1998 Buick Century is factory-equipped with R134a refrigerent.

As for the service port, you just have to look for it. Not even the factory service manual will tell you exactly where it is located. It will be either on the accumulator itself or in the low pressure line between the accumulator and the compressor. (see diagram)

78956175

Jul 18, 2011 | Buick Century Cars & Trucks

4 Answers

What type of freon is in GMC trucks of 1987?


R12.... In 1994 R134a was required, but some changed earlier. Yours may have been converted. If the service ports are threaded it still has R12. Hope this helps.

Jul 05, 2011 | 1987 GMC R1500

3 Answers

How do you know what type of refrigerant to put in a 96 crown vic?? r-12 or r-134a?


1995 and newer is the R-134A.We have a 1995 and I checked that out long ago.Whew! Good luck!

Jul 22, 2010 | 1996 Ford Crown Victoria

1 Answer

I need to put 134A refrigerant in my 2004 Grand


The lowside port is located by the firewall next to the brake booster and the highside is located next to the air filter box towards the bottom.

Jun 07, 2010 | 2004 Pontiac Grand Prix

1 Answer

How can i add freon to my cars' air conditioner for a ford focus zx4 se?


Charging the System

  1. Lubricate the refrigerant system with the correct amount of clean PAG oil.
  2. Connect an R-134a A/C service center to the low-side and high-side service gauge port valves following the operating instructions provided by the equipment manufacturer.
  3. Set the refrigerant charge amount, and charge the refrigerant system following the instructions provided by the equipment manufacturer.

May 23, 2010 | 2005 Ford Focus

3 Answers

Have 134a refrigerant and shop where I bought it said owners manual will have the how to instructions. Unfortunately it doesn't. I see on the line there is a stem to screw the hose into but want to make...


No,you won't find it in the owner's manual. It charges through the low pressure side,which is the larger of the 2 available ports. You can't hook it up wrong. I suggest you buy a Hayne's manual for the truck. It has 90% of any answer you might need. A/C can be tricky to fix for the novice. If charging doesn't work,take it to the shop.

Jul 13, 2009 | 2001 Dodge Durango

2 Answers

Will I be able to put r-134a refrigerant frion in a 1992 acura vigor


I'm not sure if the system on that car is 134a or R12. There should be a decal under the hood that will tell you which one you are currently running, or on the compressor if it is easily visible. If it is an r12 system, you will have to buy a retrofit kit that converts the charge fittings to take 134a, as they are different size fittings.

Jun 25, 2009 | 1992 Acura Vigor

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