I you look at Bentley page 19.12 you will see that neither of the
versions you mention are stock and both will run the fan sooner and at a
lower temp than what an 85 probably has if it is original.

Mark

Jeff Oxroad wrote:

> .............
>
> But here's the deal as I understand it. VW makes a switch that will turn on
> your radiator fan at a cooler temperature than the stock switch. According to
> the Bus Depot website the stock switch vs. "low temp." switch are as follows:
>
> (these show the low speed on and high speed on in Celsius followed by the
> part number on the website _www.busdepot.com_ (http://www.busdepot.com)    the
> switches are about $12)
>
> 3-point, low temp version, 75-70/82-77c   25195948175
>
> Stock, 3-point, 85-74/93-82c  251959481K
>
> ..............