Dishwasher disassembly

Brand:Thermador
Model Number:DWHD440MFP/08
Main Symptom:Trying to access pump/heater part to replace it. The most logical area to access this part is from the underside of the dw but there is a leak panel that I am unable to remove. Any suggestions?

What happens & when:

Error Code (if any):
Parts or tests already tried:
Photos / video link:

The base will need to be removed to get to the heat pump assembly: With the machine pulled out, remove hoses so it will lay on its back. Remove the screws holding the base to the tub frame assembly. Part break down and picture attached:

https://www.appliancepartspros.com/base-power-cord-parts-for-thermador-dwhd440mfp-08.html