you wrote:
>  Can anyone tell me about this switch ... pictures and more info at ...
>  http://www.lame.ca/mysteryswitch.html ... thanks.
>
>  peace
>
>  be

I have a '81 westy: between the two LED indicators  (water  -
battery) is a toggle switch on mine to switch between the indicators.
The location is where - what seems to be - another LED is on yours?

The mystery switch is indeed the Eberspacher Heater Safety Reset
Relay (as others pointed out).

P.S. what color is your westy? looks yellow? An "unuasual" color
--
Karl
'81 Westy "Jenny"
Wilmington, DE