See the above thread on the ML. I would change it at 60k at least. All of the older cars are every 30k. I think that 60k will be fine with the synthetic fluid.
The oil filter is located, as you are standing in front of the vehicle, to the right rear. IT is under the plastic cap.
You will need a specail tool to remove the cap. You can purchase it and all of the parts from us.
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