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Old 01-16-2000, 05:53 PM
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Join Date: Dec 1999
Posts: 102
I heard that the evap. leaks on the early w140's.. what events would take place to let me know that i need to replace it?? the ac works fine.. but the pressure of freon in it is somewhat low according to the onboard DTC... isnt the bad evap cores a result of not using r134a????
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Old 01-16-2000, 06:29 PM
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Join Date: May 1999
Location: Charlotte, NC, USA
Posts: 688
The indications are that you will lose freon and will continue to do so and more frequently as time goes on with the recharge.
The reason is not the freon because they don't go bad from the inside out but rather the outside in. They were manufactured and not coated properly and in time they get eaten by microscopic on the net!
The replacement ones are dipped in plastic on the ends and are available new or from an aftermarket supplier. There is such a demand that other suppliers made them, not just Behr. Dlr price is around $1k while others are from $200-700. Dealer inst rate is about $1200 as it takes just 21.8hrs to do the job. Been there, done that!! Ugggghh!

300SE, 300CE, 190/5.0
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Old 01-16-2000, 07:11 PM
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Join Date: Dec 1999
Posts: 102
is there a way i can find out if i need to replace it now????
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Old 01-16-2000, 08:20 PM
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Join Date: Mar 1999
Location: Suwanee, GA, USA
Posts: 4,712
I add dye to the systems that I suspect leaking. Then run them for a while and check the drain tubes with a UV light.

1981 280GE SWB
1987 16V

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