Date registered: Oct 2012
Vehicle: 1968 250S, 1991 300se, 1998 SL500, 1977 450SEL 6.9. Past MB's; 300SD, 300E, 300TE, 190E, ML420
Mentioned: 12 Post(s)
Quoted: 488 Post(s)
the ones with the black rubber seal are genuine MB parts. the seal does not come off. (unless your force and ruin it)
If your is still good , do NOT replace it. From the picture it looks good to me.
the blue replacement seals will fail in a year.
the MB replacement ones are about $80 each from classic center