Okay, so I've replaced the front rotors and pads on my 1995 e320 wagon in the past by referring to this great link...

http://www.peachparts.com/Wikka/W124BrakePads

However, I was wondering if the same rules applied to the rear brakes of a 1992 4matic wagon? The pads are almost completely worn (light just started to come on). I'm assuming there must be sensors but I didn't notice one on the left side (and ideas)?

Also, do I need to release the parking brake (I have blocks behind front wheels)?

Things looked a little different back there and I could use some insight here (things to look out for etc).

Thanks!
Michael