Dimitri has a 240D.
240Ds don't have fan clutches.
Some of the fan clutches DISENGAGE the fan at highway speed. Even if they don't
the fan is effectively doing nothing at highway speed. There is way more air
being slammed over the radiator by the car moving forward than the fan could
ever move.
At highway speed you don't need a fan at all.
Thus you're wrong, a bad fan clutch will not make the car overheat at highway
speed. Or rather it won't be because the fan isn't spinning, there might be
another factor at work.
As an aside 190Ds have electric fan clutches, they will always be disengaged
when the engine is off...
-Curt
Date: Fri, 13 Jul 2012 14:07:44 -0400
From: andrew strasfogel <astrasfo...@gmail.com>
To: Mercedes Discussion List <mercedes@okiebenz.com>
Subject: Re: [MBZ] Running hot.
Message-ID:
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The obvious question is "have you checked the coolant level"? I
presume the answer is YES and the level is NORMAL.
If so, with the engine off spin the radiator fan. if it spins freely
without reistance the fan clutch is worn and needs to be replaced. A
worn fan clutch will cause the engine to run hotter at highway speed
than at slower speeds. At least this was the case in my W108 sedan
and W111 3.5 coupe.
DImitri - are you reading this?
On 7/12/12, Curt Raymond <curtlud...@yahoo.com> wrote:
> How often was the coolant changed and was the engine ever overheated?
>
> Even with genuine MB coolant if you never changed it and then overheated the
> engine a couple times you'd probably blow a headgasket...
>
> -Curt
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