Date registered: May 2016
Vehicle: 2000 S430, 2003 S430, 2003 S600 TT, and 2005 E320 CDI
Mentioned: 163 Post(s)
Quoted: 923 Post(s)
Just checked the project 2000 S500 (yeah, I'm up kinda late). Nope, not there. The 2003 S430 and 2006 S600, by contrast, both have them, but those are post-facelift cars.
Looks like you're using the "old school" child seats that use the seat belt for anchoring. Hey, they still work.
2000 S430 (Dad's car, used for special occasions)
2000 S500 (best friend's--now WIFE's--DD: my first W220 project car, once gone to, and now returned from, an excellent home--welcome back home, baby!)
2003 S430 (one of two current DD's--second W220 project car)
2003 S600 (third w220 project car, "sex on wheels")
2005 E320 CDI (the other current DD--first W211 project car)