You can likely reuse the crush washers with no ill effects (I did, simply because I couldn't get any new ones). The drain plugs take a 6mm hex bit, are aluminum and the allen recess can strip out easily if you aren't careful. Snap-On's shorty bit works great here. One drain each sid eof the block, left side is toward the front and the right side is slightly back, close to the motor mount if memory serves correct. When the plug comes out water may, or may not follow. Often the hole is slightly plugged with crud, no biggie just poke gently and break the crud plug, then the water will gush. On the subsequent flushings, be careful of hot water and keep an eye on the washers, they often stick to the block, then get flushed to the bottom of the bucket during the flushes.
Hope this helps.
'73 280SEL 4.5 (9/72)- RIP
Only 8,173 units built from 5/71 thru 11/72
'02 CLK320 Cabriolet - wifey's mid-life crisis
2012 VW Jetta Sportwagon TDI...at least its a diesel
Non illegitemae carborundum.