SILVER03CLK320

I have a 2003 CLK320 and from the time I start the car until the A/C engages and begins cooling is about 5 minutes, whether the car is idling or at speed. Does anybody know how to address this issue? Thanks in advance.

Plutoe

yes get a set of AC gauges---what is the high and low pressure readings and post the data

SILVER03CLK320

Pressures are the first thing I checked. With the car running and calling for cooling, but before the compressor engages, the pressures are equal and static at about 90 psi (we are in the upper 90's here in Phoenix). Once the compressor engages and the pressures normalize, I am seeing 225/28, which is about where it should be.

I understand what you're looking for however, the problem is that the compressor doesn't even attempt to engage for several minutes after it is called for. After several minutes the compressor will start and the pressures normalize, and the car cools well. I just can't figure out why there is no compressor call for the first several minutes. It's almost like the car is waiting for something before it will allow the a/c to start. Thermostat/engine temperature? IDK.

Plutoe

You have used up all the free stuff with no solution. Now you can sell the car or find someone with the proper diagnostics to determine the failure(XDOS)

SILVER03CLK320

Well that's helpful, thanks bunches!!! I don't know what I'd do without that kind of help from people like you.

Serndipity

SILVER03CLK320 .....The A/C control module (N22), has the above built in self test capabilities, that provides both system values as well as diagnostic trouble codes.

SILVER03CLK320

Serndipity,

Thank you. I truly appreciate your willingness to help and your knowledge.

SILVER03CLK320

Serndipity,
Thank you for your previous input, however, it seems that I have a newer and digital version in the 03 CLK320. Do you have similar info for the model I have?

Serndipity

The self test/diagnostic procedures I posted would be valid for W208 CLK coupes through MY 2002 and CLK cabriolets through MY 2003

Is your 03 CLK320 a coupe or cabriolet?

If it's a coupe, it's a W209 model and would be covered here: https://mbworld.org/forums/clk-class-w209-43/