No problem. I think it is very important to clarify. Thanks for asking.
Regarding the upper shock mounts, honestly on my wagon I never have touched them. Instead, I blasted them from outside with a can of silicone lube with a snorkel tube. I pushed them around a bit afterward and used a rag to mop up any spills.
Regarding the "when you say 'replaced the latch mounts' (missing rubber isolators) do you mean seatback latches--the metal loops on the seatbacks or the mechanism on top of the wheel well? OR something else?"
I was referring to the latches of both rear covers, one for the spare (L) and the other for the radio antenna etc (R). These seemed to be the major squeakers! I studied them carefully, looked at another wagon and discovered that mine were missing little rubber covers. I also adjusted them by repositioning them to have a little bit of preload, so when they are closed they are tight.
Want a picture?
'03 E320 Wagon-Sold
'95 E320 Wagon-Went to Ex
'93 190E 2.6-Wrecked
'91 300E-Went to Ex
'65 911 Coupe (#302580)