I have a 93 W140 500SEL, it has not got the parktronic device on the dumper bar. Instead, it has two metal rods coming up at the back when I reverse. Honestly, I do not know what is the point to have those. They do not seem to be very useful to me.

Anyway, can I retrofit the parktronic sensor etc to my car. Where can I find the parts?

Thanks
Michael Tse