Your car has a drain plug in the FRONT of the radiator and it might actually be accessible. In many cases, it's easiest to drain the radiator by simply removing the hose that's connected to the bottom corner(passenger) side of the radiator. This hose is about 1.25 to 1.50 in. in dia.
Lots of good info in front of this post(Sixto-Pmizell)
1991 300-SEL - Model 126
M103 - SOHC
James Madison - Oppressors can tyrannize only when they achieve a standing army, an enslaved press, and a disarmed populace.
Liberty Firearms Training - After years of trying to regulate California criminals with a never ending stream of gun control laws they have still not given up with the belief that if they make something a crime that criminals will miraculously start obeying the law.