so far changed all the fluids. spark plugs, hand turned the motor. Took the carpets out washed dried with industrial grade fan and of course dehumidifier. Cars were not running at the time and no water visually got into engine, brake, power steering windshield reservoirs. pressure washed the engine bays, undercarriage, air dried them etc.
water was below seat level. Will keep posted how it goes. BTW ordered power distribution units(fuse boxes) from Germany.
Power distribution units will need to be registered with the ecu as per the tech(will deal with it at a later point after replacement).
Any suggestions are always welcome.