You seem to miss the fact that logo or no logo the part number 193 820 01 26 is a Mercedes part number. It is not a Chrysler part number, the number 5102558AA is a Chrysler number, can you see the difference? They come from two different numbering systems.
Maybe some of the wetness in the trunk is due to your tears.
All cars have problems like it or not, my Chrysler 300 was a piece of junk, so much so that I will never buy another Chrysler again. Prior to that I had a Chrysler Concorde and LHS, they had their problems too but they were nice cars nonetheless. I replaced the 300 with a Hyundai Elantra, no problems in three years.