Convert to R134 on 1995 C280
 

Since it's so hard to find a shop willing to simply recharge my r12 system. Most say all they can do is convert the entire system to R134 but want to charge an arm and a leg.

I purchased the conversion kit from the auto parts store but it didn't work. The fitting in the kit was wrong or something, the kit said r12 to r134. What am I doing wrong?

Basically my question is how do I convert the low and High side fitting to r134?



Thanks

Your car should already be 134a

What country are you in?

that is what I was thinking.

It is ................................

Read the yellow A/C " Refrigerant Type/Capacity Warning Notice " tag on the radiator cross member.

All MB's starting in 1994 had R134a from the factory!

really so why cant I get this r134 recharge kit to fit. I got one with a gauge on it from Advanced but it doesn't fit on the low side.

The one with the black cap right behind the compressor right?

I am not familiar with the C class but my 95 E320 has the low pressure side fitting up near the intake manifold and about halfway back to the firewall. The high side is slightly to the front of the compressor and down lower in the engine bay.
You need to find the low side fitting (it is the smaller diameter of the two).
Please be careful and wear safety glasses. This is a job that is better left to someone that understands a/c systems.

Man I'm stumped, Mercedes faxed me over an AC system Diagram but it looks like I'm missing something.

I cannot find the low side. The one down below right behind the Compressor is in fact the High Side. I traced every single line but some go underneath very hard areas to see.

Anyone know what general area I should be looking? Isn't it true in most cases the low side sits higher than the high side?

Post a pic of your engine compartment - the experts here will quickly identify the port. It should be in the "thicker" A/C line which is typically wrapped in foam. It may have a black cap on it which might be making it harder for you to see.

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Yep... in fact, I think most car companies switched to R134a in 1994. Lexus changed over in 1993.

On my car the other fitting is just behind the grille on the drivers side by the side of the radiator. Open the hood, look at the front of the radiator (where the bugs are) and look at the drivers side of it. See if there is a black cap peeking out. I don't know if that's high or low but the other fitting is behind the compressor. Don't know if it's the same for '95.

In the E class chassis, the switch over to r134a started in 1992 with the 400E and 500E.

The 300E and 300E 2.8 came with it in 1993.

fittings
 

you get small size to large size adaptors and vice versa , you can use any of the charge points depending on whether you are using vapour or liquid if you havent done HVAC dont do it yourself you can destroy your compressor vanes , if r12 your system must be flushed and new orings fitted the gasses are not compatible and make an acidic mix which will destroy your system over time , that is why it costs to convert.