Robert, I’m not aware of multiple wear sensors, but I guess there could be. Not sure what the value of that is…
I realize this is after the fact, but for the future, any time you replace rotors, buy a set of retaining screws, as they’re cheap and I’m sure your dealer stocks them. 201 421 01 71 should be the number, but verify it with your dealer based on the last 8 characters of your car’s VIN. Unless later models changed something, there are not typically sensors on the rear pads. They wear much longer than the fronts are are typically inspection items whenever the front pads are changed. -D > On Aug 21, 2020, at 11:31 AM, Robert Koziak via Mercedes > <mercedes@okiebenz.com> wrote: > > Hi All, > Yesterday I started changing all 4 rotors, pads and brake wear sensors on > my 2004 320E 4Matic using Genuine Mercedes Parts. I ran into a few > issues..... > 1 - I couldn't get the rotor screw out so I had to drill it off. Does anyone > know the screw and thread size so I can tap for a new screw which I just > ordered? > 2 - The dealer supplied me with two brake wear sensors. When I took off the > sensors on the front brakes they were two different sizes? Called the dealer > who said they only stock one size and the second one was not needed. The two > sensors are positioned at different thicknesses in the pads which trigger at > different times. One is designed as an early warning half way sensor? > Anyone else come across this? I ordered the second sensor and will install > it anyway. > Also are there two sensors on the rear pads and are they different too? I > haven't started the rear brakes yet. > Thanks, > Bob K > > > > > > _______________________________________ > http://www.okiebenz.com > > To search list archives http://www.okiebenz.com/archive/ > > To Unsubscribe or change delivery options go to: > http://mail.okiebenz.com/mailman/listinfo/mercedes_okiebenz.com > _______________________________________ http://www.okiebenz.com To search list archives http://www.okiebenz.com/archive/ To Unsubscribe or change delivery options go to: http://mail.okiebenz.com/mailman/listinfo/mercedes_okiebenz.com
