Seat covers always look xxxx, your best best is to get some fiebings leather die,

(black) some

fiebings mink oil if you can get hold of it and neutral leather balm, there is one called lord sheraton which i find works extremely well and go to work.

You will be amazed at the results! They will look like new

! but make sure you seal them with mink oil or similar other wise you will have black stains on all your cloths!