Up underneath the car - just the the left of the right rear tire. Filter is metal and a bit smaller than a beer can.
I find it helps to back the car up on ramps in order to have better access. I also pull ground strap off the battery for safety before starting this job.
Not too tough of a project.
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.