Our wagon had a squeak from the r. rear .... I finally figured out that it was the right rear seat back latch, which holds the seatback upright. I put a light coat of silicone where they come in contact.

So far, so quiet. Maybe this will help ....

Haasman

__________________
'03 E320 Wagon-Sold
'95 E320 Wagon-Went to Ex
'93 190E 2.6-Wrecked
'91 300E-Went to Ex
'65 911 Coupe (#302580)