4, 2ton floor jacks would get it in the air just fine, but I wouldn't get under it.
I never get under a car on a floor jack, even though you have four of them, it would only take one to have a hydraulic leak or an accidental trip. Find some jack stands and use them. If you don't have jack stands, ramps or a lift, buy some good jackstands, how much are your limbs or your life worth?
'84 Euro 240D, 516K miles
'88 300E 5 Speed
Over 800,000 miles in