Some swear by Mother's Back to Black, but others use less orthodox means such as those mentioned here
I have tried the unorthodox method of the passenger side handles and after almost four months they still look good. Next wash & wax all handles get treated.
'73 280SEL 4.5 (9/72)- RIP
Only 8,173 units built from 5/71 thru 11/72
'02 CLK320 Cabriolet - wifey's mid-life crisis
2012 VW Jetta Sportwagon TDI...at least its a diesel
Non illegitemae carborundum.