Please help opening/debugging Thermador Professional and igniters

Hi, I can really use your help to fix the igniters on our “Thermador Professional” 6-burner gas cooktop.

The house we moved into has an old gas cooktop, 6 burners. I've looked everywhere for a model number and I cannot find it, but it looks like this:

View attachment 55770

View attachment 55771

Gas flows normally to all burners and I can light them all with a match.
The front and back burners share a single igniter, so there are 3 igniters.
The igniter can...

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via Please help opening/debugging Thermador Professional and igniters
by lewinr