The red panels on the sides of my seat were badly scuffed and dirty. I cleaned them up a treat using a jml magic eraser.
It's a white hard foam that comes in a block, cut a small block off, wet it and squeeze most of the water out, then rub over the scuff marks. Do small areas then go over with a wet cloth to remove the dirt.
Only trouble was it cleaned the seat so well where the scuff marks were that I had to clean the rest of the seat as well. The eraser breaks down into smaller chunks as you use it due to the rough texture on the seat.
Bought from Sainsbury's.