I am taking my 240d to meet some friends in Glamis. I will have to drive about half a mile to a mile on flat sand up a dry wash to get to them. other than airing down the tires, what else can i do to prevent my poor car from burying itself?
also can i plug my cool air intake(duct tape) to prevent sand from clogging my new air cleaner?

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1979 240D with a 617 turbo diesel.