Notso, dunno how you define "unibody" but independent body with integral welded frame of its own, mounted on sub-frame wishbones where suspension components bolt onto the mix suits me fine..... same design as earlier Pontoon "bath-tub" cars which are recognized as the first unibody car that MB ever built. Um, maybe you dont recognize door posts, roof pillars and undercarriage longitudinal beams as frame built into the body.
Otherwise, i agree with you that suspension work is NOT beyond the scope of typical DIY endeavors.... er, with correct tools that should probably include small propane torch, short handled sledge hammer, ball-joint separator, 1/2" drive full length break bar, hollow pipe for leverage, can of PB-Blaster and of course a couple of jackstands and cheap hydraulic lever jack plus spring compressor clamps to access rear shocks. Lotsa muscle work, wrastling with suspensions. And Josh, you'd probably want to throw more than one professional wheel allignment into the mix as work progresses, over say 5 weekends spaced at snail's pace over couple of months that keeps the rest of your life in tact. It once took me an entire afternoon just to turn one rear subframe bolt on my 280/8 long time ago...... but working on the car still provides the finest escape I've ever known from the mundane world. Gotta love the sense of accomplishment it provides.