Hello,
Just found out why the ac in my '89 300e won't hold a charge--mechanic says the evaporator core has failed and he needs $1,600 bucks to install a new one. I've never installed one myself but it looks like I'm going to now because I've got more time than I do money.
Several mechanics have told me that the whole dash has to come out to get it out and I don't doubt it. I'm not looking for a step by step by any means, just any tips for avoiding the big "gotchas" and things like..
how long should it take me (of average or better skill) to do the job if I need any special tools how I can check for leaks after it's installed but before I re-install the dash if there are any other parts that I should also replace while the dash is out and who's a good source for the core
Also, I can hear one of the flaps in the ac ducting making a thumping or popping noise about every second or so (when the ac's on of course) and there is little or no air coming out of the center vent. Is that because one of the actuator pots has failed or is it something else? Can I tell if the pot has failed by inspecting it visually or do I need to take a vacuum on it to find out?
As for the cost of the part(s), thebenzbin wants $282 with the "valve", $186 apparently without the valve, and ACKits wants $145 also without the valve. Is one of these going to be better quality than the other and should I replace the valve also.
My last question has to do with the cost I was quoted by my mechanic. Both of the evaporator cores on thebenzbin have a suggested retail price of $960. I know for a fact that my mechanic has charged me or quoted me the exact same suggested retail prices shown on this website for several other high dollar parts and I'm wondering if $700 or so of that $1,600 bill is a markup for the difference between the two costs of the part? I'm not grudging my mechanic the ability to make a decent living but is it customary and does it seem right to charge $70 per hour to do the work AND markup a $200 or $300 part 300 to 400 percent?
Thanks in advance for your guidance and comments.
Mike