You may be right I am talking about a 560sel and it should read 70% or 80% if it is a california car. So Capn check the manual for your car it should tell you the correct setting for your year and model.
2005 320 CDI
2006.5 VW Jetta TDI
1991 560SEL (179000 Sold)
1972 280SEL 4.5 ('The Lead Sled' 320000 miles when sold.)
1972 220D (225000 when sold)