Hello ...
Monkoustic..
I found the Model Number...
They had Three lines...
One Model... just different control panel colors made the number change.
Your Model Number is...
GM 286-710 Last three are the color number.
Which yours stands for Stainless Steel.
the others where...
White on White...720
Black on Black....760
You have 4 wash programs.
1. Intensive-
Cold prewash
Long wash at 170f
2 Cold rinses
Last rinse at 155f
Drying
That symbol is the pot and plate underneath.
2. Normal-
Cold prewash
Short wash at 150f
2 Cold rinses
Last rinse at 155f
Drying
That symbol is a glass, cup , and plate underneath.
3. Economy-
Short wash at 120f
Cold rinse
Rinse at 155f
Drying
Than symbol has a dot and rectangle.
4. Light-
Cold prewash
Short wash at 120f
2 cold rinses
Rinse at 155f
Drying
That symbol has a glass with a sparkle.
Top left of the dial.
5. Prerinse-
1 Cold rinse, drain.
All Drying is Turbo hot air drying...
Which my GM 215 did not have.
The spray arm at the bottom has a three position spray system ...
1. Normal
2. Higher
3. Intensive wash pressure..
I used to use that 3 position and take a the top rack out and put in major pot and pans in and get a Excellent clean !
U can hear the sprayarm turning really fast.
Fun machine.
My scanner is packed up.
But I well try to get to my friends this week to scan and document this machine here for future reference at A.W.
There was no parts listning there is a circuit diagram.
But you might have to get in touch with Gaggenau for the timer.
Your model used and electronic board mine was electromachanical a lot of clicking lol.
If you need me to scan and copy the manual for you E-mail me and I will do so.
Hopes this helps for now.
Darren k.