I do not know the dimensions of your ML350 but here is the Sony A9G 77" Box Dimension: Height 44.33 inches, Width 72.87 inches, Depth 8.14 inches.
I had to use utility trailer as Best Buy did not have delivery where I live. I do not recommend you lay the tv on it's side. See https://forums.bestbuy.com/t5/TV-Home-Theater-Knowledge-Base/Transporting-Your-TV/ta-p/1047634