Hi all,
The headlights on my late 2001 530i Sport are not quite as bright as you'd expect from Xenons - especially not when compared to the other E39 we have, a 2002 530d.
I suspect this is becuase 140k miles has taken its toll on the condition of the lenses - you can see the shotblasted effect if you look carefully when the lights are on.
Any tips for cleaning this and restoring them to decent condition or is it a case of replacing both front light units?