Garbage, garbage, garbage. Sell it while you can. Had one for 3 years from 25k to 75k... another I bought at auction recently a dumped it. Same repeated problems with those and on the BMW forums.
Where shall we begin...
The tires are from the factory out of alignment and wear unevenly. This is a problem with all 4.4i sports that cannot be fixed since the wheels are so wide. $400 a tire every 15-20k miles.
Next we move to the suspension, which can't hold up well on regular city roads, let alone anything off road. Don't expect much past 75,000 miles on that.
If you turn the wheel to full lock very often it will tear the front axle boots.
Cooling system: All made of poor plastic and breaks. Intake gasket leaks and the engine starts drinking coolant with the 4.4i.
Transmission: "Lifetime" fluid kills them.
Engine: 15,000 miles or 1 year oil changes sludges them up. the 4.4i can take the abuse but the 3.0 will start sludging up and using oil.
Accessories: Suspension air pump will fail early. Power steering pump will fail early. window motors will fail early.
Electronics: Let's see how long it takes for you to break the electronic latch for the rear hatch. Are their more dead pixels in the dash and stereo than living? It also always thinks that one of the tail lights is out when they aren't. I even had a tail light socket short out and melt on me.
What else? Inside door latch quality is worse than a 10 year old Kia and will break off in your hand at some point. The leather is not close quality wise to anything MB has done. Enjoy random rattles and noises, and the constant dread.
Also, people will assume you are an a-hole for driving one.
It makes the first generation ML seem like a tank in comparison.