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That panel is removable with a pry tool or by pulling straight up. The drawback is the plastic tabs that holds those buttons are probably broken....
How long have you owned the car, what’s the mileage? Do you know which recall that the dealer referenced? Do some research on the 23TE03...
I would say, also look at replacing the EGR cooler, I tried cleaning mine when I did the head gasket. It was totally plugged up, found a...