I have had four 4x4 vehicles since the mid eighties 1st being an old Landcruiser apart from services there were no other repairs of any sort traded that in in 1987 for a LWB Nissan Patrol, the 4x4 specialist I bought it from in Norwich asked what my main priorities were which were towing capacity & reliability I was also looking at a Range Rover he had which he said to rule out re reliability! Kept the Nissan almost 12 years only repair was a fuel pump . Next was a Subaru Forester terrific vehicle abused completely ,towed way beyond its limits only repair were wheel bearings , swopped that for the Terracan which again has proved very reliable had it 5 years had a new battery & alternator in the last month. Range Rovers are without doubt the best looking 4x4 without doubt but that's about all in their favour, as for the BMW just a posers car in my opinion. As for a V8 Merc you will enjoy it 😉.