If it's where I said it is, you can see it from the top.
Pop the hood and walk around to the passenger side - right front. Look down underneath the exhaust and more towards the rear of the block. Should be a drain plug coming out the side of the engine.
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.