Well most of the easy things i can do by myself.
What I have found on our ML is that working on them is not hard just time consuming spark plugs 4hours for all 16.
Engine mount 3-4 hours one side 5-6 the other.
Rear struts 4 hours each side the top bolts are hard to get to.
As to speed 0-60 mph 6.7 seconds.
Know you said you English is not to good but If you can get through this or find a copy in your language.