I am going to give the 250 an oil change so I need the whole of the car off the ground at once and level. I can get the front on a set of ramps then that leaves me with the back to get up, where is best to jack up from on the rear and place some axel stands, on my 182 I just jack up off the rear beam in the centre so both wheels come up together.
Once the front is on the ramps use the Jack to Jack up one rear corner, the other side will come up with it at the same time because the meganes are so stiff. Then fire a stand under the opposite side.