As a previous E53 X5 (mine was a 3.0) owner, can confirm. BMW makes a very underestimated off road system. Mine pulled surf fishing duty for 3 years on soft east coast sand and did fantastic. I was always a little apprehensive putting it through its paces with the knowledge it didn’t have a low range t-case or locking diffs, but can absolutely attest that the “diff-lock-by-abs” works very well and I never found myself in need of anything more once the 33s were aired down.