I've got a slight flickering of the headlights within the first few minutes of use then they settle down to normal without issue.
Only started after suspension replacement/lowered ride height
Flicking is normally bulbs on its way out as Faisal has said. Normally a good idea to replace them both as typically if one is going the other won't be far behind and it's a bumper off job to change the bulb. Osram can be had for around £100 a pair
It can be done without the bumper being taken off and headlights in situ. Just requires a bit of patience.
Daytona Grey, Bilstein Coilovers, Pre-cat delete, Centre resonator delete, IM flaps/vains delete, Interior/Exterior LED kit, CAI, Black Optics.
Other car: Bread Van
RS4 B7, Mugello Blue, K&W V3 & HR ARBs, set up by Centre Gravity, Milltek Valved Non Res & cat bypass pipes, BMC air filter, braided hoses, DOT 5.1, Terraclean, MRC Full Carbon Clean, MRC remap 448PS 477NM, 20" S7 alloys with 4mm spacers & Hawke spigots 66.6 > 57.1, AP Racing front discs. Sold Sept 2019. Now rocking an F80 M3