WOW..... I'm gobbsmacked....... That's just horrible.
I can validate you 4WD Attesa issue because when I finally parked my car on the sand, I noticed that the 4WD light was on in the dash!
Fortunately, after turning it off and then restarting the car later and making it home, all is well and the light hasn't come back on since.
Unfortunately whilst all intentions were to have a great fun day by all, this run potentially could be remembered as the "SAU Nightmare to Patonga!"
I really feel for you mate, you dodged a bullet with your original purchase at EL's but now got blasted by a cannon!
Bob.