I did not like the idea of seeing a bright white side repeaters on my black ST170. So what did I do? Fit an smoked side repeaters of course! That will "hide" the side repeaters, but comes alive with bright orange when in use. And it's "E" marked, which means it's legal to use.
As usual, I got mine from ebay as they have various colours to suit your car's colour! And some of them are cheaper to buy than from a shop.
Removing and fitting the new one is an easy step, which should take you about 5 minutes of your time per side.
Remove the metal holder, unplug the old side repeater from the black plug. Then twist the bulb holder and pull it out of the side repeater. Put the bulb holder in the new side repeater, twist, plug the black plug back on it and carefully insert it in the side panel.