R129 Evaporator Replacement - Mercedes-Benz Forum

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post #1 of 14 (permalink) Old 03-19-2017, 07:17 PM Thread Starter
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Cool R129 Evaporator Replacement

I have a leaking AC evaporator. Has anyone attempted to do that replacement themselves? If so what was the level of difficulty? Was there special tools involved? I am trying to decided if it is worth fixing. I have a 1995 SL 320 and usually have the top down anyway.

Also, has anyone had the evaporator replaced at the dealer or other shop? What was the cost?

Thanks
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post #2 of 14 (permalink) Old 03-19-2017, 11:06 PM
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I did the one on my W124, its a lot of work and time, not hard just all the fiddly things that have to come apart, the complete dash has to come off, I'm sure the R129 has more stuff! hardest part I had was removing the heater box, while I had it all apart I replaced evap , heater core, all vacuum elements for HVAC system, about 8 hours for removal and 6 for reinstall, I have knowledge on air condition systems, tested and refilled my system, my total cost was around $500 in parts, I'm sure SL parts will be more, a dealer or indy could charge big time! 2-3K or more, but it can be done in your home driveway!
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post #3 of 14 (permalink) Old 03-20-2017, 02:05 PM
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$4000 at the dealer. Huge job.
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post #4 of 14 (permalink) Old 03-20-2017, 04:12 PM
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There's some stop leak products that sometimes work for years.
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post #5 of 14 (permalink) Old 03-20-2017, 04:19 PM
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post #6 of 14 (permalink) Old 03-21-2017, 10:43 AM
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I saw an episode of Wheeler Dealers where ED removed dash for hvac pod replacements , it was on a 560SL, he complained of the huge job, heck he didn't even do the heater box! thats the beast to rebuild.

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post #7 of 14 (permalink) Old 03-21-2017, 06:58 PM Thread Starter
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Thanks

All, I appreciate your response. This will give me some thing to consider.

I saw the article of AC Stop leak but am nervous about taking that step after hearing all of the horror stories clogging the system.

Lowesguy thanks for your input. I am considering doing the replacement myself. I have all of the AC equipment and have done other repairs.
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post #8 of 14 (permalink) Old 03-21-2017, 07:25 PM
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Quote:
Originally Posted by aullery View Post
I saw the article of AC Stop leak but am nervous about taking that step after hearing all of the horror stories clogging the system.
Can you point us to some of those stories? I mean credible substantiated stories, not internet hearsay. There's lots of that. I've been following the products for at least 10 years and have seen an awful lot of positive stories with years of success. Of course it doesn't always work if the leak is too large - but you're not out much to try it. You're the perfect profile for the product when the market value of the repair approaches the market value of the car.
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post #9 of 14 (permalink) Old 03-22-2017, 11:00 AM
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The joke among the veterans is that Daimler hangs an evaporator on a string and builds the car around it.
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post #10 of 14 (permalink) Old 03-22-2017, 11:49 AM
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Quote:
Originally Posted by aullery View Post
All, I appreciate your response. This will give me some thing to consider.

I saw the article of AC Stop leak but am nervous about taking that step after hearing all of the horror stories clogging the system.

Lowesguy thanks for your input. I am considering doing the replacement myself. I have all of the AC equipment and have done other repairs.
What do you have to lose? If it leaks now it needs repair, but if it can be fixed for a while with stop leak great, and if the stop leak clogs the system it still has to be fixed, so gain, possible working AC system with the stop leak, worst case you have to tear it out and fix or live without.
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