tazo1976

I just recently got 2009s550

and the headlights are not buggy at all
it has HiD but not bright at all

is that normal ? Headlights need alignment?

thanks

tbilisi79

They are self leveling lights. You shouldn't have to adjust anything.
Are the lenses clear? Yellow from age?

BOTUS

xenon bulbs deteriorate with age / use. Modern bulbs are whiter and brighter too. So swapping these will likely give a big uplift
if you have night vision, you basically exchange high beam for nothing - and yes it makes the car dam dangerous in pitch black conditions above 60mph
if something has fallen off (level sensor - or internal part inside each lamp unit - which afflicts a lot off other brands) the reflector can be pointing pretty much at the floor, and until resolved you'll not see much.

if the light switch is on auto and you start the car they should nod up and down, then settle where they are meant to be... but if you have driven the car and turn on the lights on it misses this step...

tazo1976

thanks so much

what kind of bulb I should look for?
hid or led?

also what model

thanks again

BOTUS

you'd need to check what it was built with - age and spec dependent

maybe konigstiger can search for the specif bit if u supply the vin number

or try here https://nemigaparts.com/cat_spares/epc/mercedes/1/

tazo1976

Thanks
mine is 2009 221 s550

i see on eBay they sell LeD bulbs too