Relay position 7 is not used. The empty socket is there for a lighting
related option not found in US models. 3 of the 4 legs are wired up and
that Hella  relay should click whenever the running lights are turned
on/off while the key is on but the output leg of the relay has nothing
to do. Some enterprising person could have figured this out and added a
wire to pin A22 so the relay could be used. My guess is it was intended
for Daytime Headlights but that option uses a different relay position
mounted externally to the panel.

Mark

Jeff Hartman wrote:
> Thank you all  for hanging in there with me as I blunder through this.
>  I do have the fuse panel free enough to check the back.First, no
> there are no numbers on that relay other than the ones I noted. There
> is also an identical relay in position 5. Other relays, labeled with
> big white numbers are 43 (position 3), 18 (position 8), 19 (position
> 10), 72 (position 11) , 21 (position 12).  I have neither air
> conditioning, nor heated seats.  The vin number is: WV2XB0259GH025126.
>   I think this bus was purchased in the U.S.  So the open relay slots
> that I could have come out of are: 1 (no wires in back), 2(yes wires
> in back), 4 (yes wires in back) and 7(yes wires in back).  I have it
> plugged into relay slot 7 right now.  Note, I said earlier I had 8
> relays.  Sorry, apparently I can't count, because there are only 7
> relays.  One more than identified by Joel and Jeff Seaman for an 86
> van.  I don't know of any original electrical acessory that might
> account for this 7th relay.  But that and where it is supposed to go
> is the mystery.
>
>