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Old 01-16-2002, 10:16 AM
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Join Date: Feb 2001
Location: Charlotte nc
Posts: 41
240d AC question

Hey guys. I bought my 240d over a year ago with a rebuilt ac compressor and a system that was leaky. After driving all over town getting opinions I settled on an independent shop that quoted $300 for changing the compressor to drier hose and recharging with r12. This included new o-rings and a new drier. Everyone else in Charlotte wanted $800 to start with. The bill came in at around $700 and I know that the drier was not changed by looking at it. That was 5/01 and the system is down again according the the fog in the drier glass though it is still cooling. I have 3 cans of r12 from moons ago and the leak appears to be around the return hose the goes from the expansion valve back toward the compressor. I am nowhere near the mechanic that some of you guys are but I have added r12 to systems before and observed a system being evacuated. Question is; should I try to rent a vacuum, try to find this hose (unable to find that name of hose in Fast Lane) and give a go at this or write a blank check to another mechanic and hope that they do me right?

As a side point, I was looking through old AC threads and noticed that newer 300's can have an under dash exchange leak problem that can cost upwards of $2500 to fix. I broke out in a warm sweat as newer 300d WAS my next dream car.

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Old 01-16-2002, 12:40 PM
Senior Member
Join Date: Jul 2001
Location: San Antone
Posts: 408
I wrote about diagnosing, repairs, and other info regarding A/C systems. Look for a reply I made in the Tech Forum entitled "are the aux fans related to a/c charge?" dated 9-15-2001. The info contained in that thread will provide some useful info that you can use to help you with your problem.

Good Luck!
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Old 01-16-2002, 01:44 PM
lrg lrg is offline
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Join Date: Jul 2001
Location: San Francisco
Posts: 1,163
You might want to consider converting to the newer (and far cheaper) refrigerant, I think it's 134A. I recently had a good, local radiator and A/C shop do the conversion, they charged $135 for everything. I can't tell the difference in cooling so it seems to work just fine. The R12 is just going to continue to be a problem so I'd just get rid of it and save money in the longer run.
1987 300D Turbo 175K
2006 Toyota Prius, efficent but no soul
1985 300 TDT(130K miles of trouble free motoring)now sold
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Old 01-17-2002, 08:22 AM
Posts: n/a
Living in Charlotte I would NOT recommend converting a 123 car to r134a. You will not have adequate cooling capacity for the summer.

I would not waste your precious R12(I've heard as high as $80 per pound for it now) without fixing the leak first. Usually the most difficult part of fixing a leak is finding it first. Replace the hose or whatever you need to do, then evacuate and recharge. Don't forget to replace the filter/drier this time.

Good luck,

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