Gumpy & others -
Personally, I still think the best bang for the buck is to replace the lousy US-code headlamps with the high-quality European-code Cibies.
Very precision optics in the lenses make for a much more pleasant night driving experience, both behind the wheel and to oncoming traffic. Use stock H-series Quartz-Halogen bulbs available at any auto parts store. Also available w/ 24v bulbs, for those so blessed.
Easily aimed - all that's needed is a blank wall and the ability to be parked 25 feet away on a level surface.
Provide a low-beam with a very sharp cut-off to the left, which eliminates glare to oncoming drivers. Has a very sharp rise to the right, which throws the light a LONG way down the road, even on low beams. High beams are like aircraft landing lights, but with much more precision.www.cibieusa.com
Not cheap - $320 for a set of four in the 5" size, but then again, what price SAFETY?? Also available in the 7" size for 4104 and Scenic owners, plus the two common sized rectangulars, for those so-equipped.
TTBOMK, the only reason they're not US DOT-approved is because they don't come with those three little "pips" on the front for use with those antiquated suction-cup headlight aimers. (Which aren't much good with all the aero-shaped headlights on cars today anyway. . .)
Chris Christiansen up in Idaho put them on his 4905, and so far, he's been the only other busnut who's backed up what I've been saying for over 40 years. . .
Or at least was willing to invest in a set to see if I was just spouting hot air?
FWIW & HTH. . .