general problems of the 1998 Lincoln Navigator

I was driving about 40 mph on a rode a drove everyday something broke on my 98 Lincoln Navigator . The guys who flipped it back over said the suspension broke I scraped a guardrail then straight across the road head on with a tree I flipped up on my headlights spun like that then rolled 50 more feet down the road it knocked me out on impact but a friend was in front of me and seen the whole thing I had a severe concussion and broke my back n four places none of the airbags deployed I would not recommend this type of vehicle for anyone there are so many complaints about the suspension and air shocks not working my sons almost lost their mom bc the suspension broke it was a very well maintained vehicle one owner be fore me who took very good care of it I only drove it for 5 months about 20 miles aday to work in back it was not lack of maintenance or anything like that.