I purchased a pair of older gaggenau wall ovens but I don't have the
user manual.

this is the model with the two knobs on the right (one for temperature,
one for mode setting) and about 5 buttons over on the right.

Can anyone tell me the basics of how this thing is supposed to work?
like what the various buttons on the right do?

they are labelled:
Timer
- a stock pot with stripey bits on top
- a stock pot with "STOP" on top
- a Hand symbol
and one knob that turns (this appears to set the time.)

can anyone shed any light

Oh and in the middle there are two lights: one is a wave symbol (which
I presume is Heat) and the other is an inverted arrow head (which I
think might be the preheating indicator)

thanks

Peter