Re: W123 300D AC Heater Servo

On Aug 18, 10:51 pm, "Tiger" <tiger0...@xxxxxxxxxxx> wrote:
http://cgi.ebay.com/ebaymotors/Mercedes-Rebuilt-123-Heater-Control-Se...

$349 with aluminum housing. rebuilt...


I bought one of the remanufactured aluminum ones from Performance
Analysis in TN a long time ago, maybe 8 years. It also had a
lifetime guarantee where they will replace it if it fails for $100. I
think I paid $400 for it. The first one started leaking in a month or
so. They replaced it and that one is still working many years
later. However, about a year ago it too started leaking, but it's
such a slow leak that right now it's easier to just put in a quart of
coolant twice a year. I wonder if the company is still around to
honor my warranty. But, even if they are not, for as long as it
lasted it was a good deal. These servos, especially the all plastic
ones have a high failure rate. The aluminum bottom housing
eliminates one main failure mode, which is to crack and start
leaking. But there are plenty of other failure modes.

If mine failed, I'd go with one of them again. The other choice is
there is a company that offers a kit that eliminates both the servo
and the amp. It's microprocessor based and converts the whole thing
to a much simpler and hopefully reliable design. I think it was like
$800. If you google in this newsgroup for "servo" or "climate
control" you should be able to find the info.

One thing I would NOT do is buy a used one.
.