Bi-Xenon Bulbs?
I myself have had issues with my bi-xenon when I first purchased the car. One light kept going out ... Mercedes eventually replaced the entire headlight to fix the situation ... lucky for me not on my dime. I'd rather leave it be then deal with a headache over bulbs.
at Trey's blunt response about the "8k Philips bulb".. perfect.
The Best of Mercedes & AMG
Hoping it wasn’t a ballast, pulled the bulb from MBenzNL’s European-specification retrofit housing and stopped off at the local McParts.
Asked the gent working parts counter for a suitable replacement. “What’s it off of?” “2004 C32.” It’s actually a ‘02 originally equipped with frosty xenon’s, so I told a little white lie. “Yours needs a D2R bulb” “Well, this one I just removed has a D2S designation embossed on its base." "Do you mind if I compare the two?” “I’ll have to get my manager since we keep them locked up.” Seems HID bulbs aren’t priced like 3 for $3.99 Costco incandescent specials! $108 later I’m out the door with a fresh D2S bulb. Works perfectly.
The Osram-Sylvania site is currently down, and Dons Bulbs’ cross-referencing capabilities doesn’t adequately differentiate between the two.
So, what’s the difference between OE-specification D2R and D2S xenon bulbs?

TIA

Hoping it wasn’t a ballast, pulled the bulb from MBenzNL’s European-specification retrofit housing and stopped off at the local McParts.
Asked the gent working parts counter for a suitable replacement. “What’s it off of?” “2004 C32.” It’s actually a ‘02 originally equipped with frosty xenon’s, so I told a little white lie. “Yours needs a D2R bulb” “Well, this one I just removed has a D2S designation embossed on its base." "Do you mind if I compare the two?” “I’ll have to get my manager since we keep them locked up.” Seems HID bulbs aren’t priced like 3 for $3.99 Costco incandescent specials! $108 later I’m out the door with a fresh D2S bulb. Works perfectly.
The Osram-Sylvania site is currently down, and Dons Bulbs’ cross-referencing capabilities doesn’t adequately differentiate between the two.
So, what’s the difference between OE-specification D2R and D2S xenon bulbs?

TIA
D2R and D2S bulbs are for factory HID installed bulbs. D2R bulbs were originally designed for Mercedes-Benz. Consequently, D2R bulbs and D2S bulbs (used initially by BMW) feature subtle differences at the base of the bulb for fitment purposes. The differences primarily consist of a cut-out and notch for fastening purposes being located differently. In addition to the base varying slightly, D2R bulbs are easily distinguished by ceramic paint along the sides of the capsule.
Fortunately there is now a new type of HID xenon bulb called the D2C, which has a universally designed base, and so can be used to replace either a D2R or D2S bulb.
splinter - you might have a universal housing that will accept both.

I have heard suggested that R was for reflector housings & S for projector housings. To my knowledge this is false.
Any input would be appreciated from a more knowledgeable member.
"S" - Shielded aka Projector
Never heard of that being false. The paint on the D2R is supposedly to shield some glare from a reflector housing.
It is also my understanding that:
"C" for D2C means "Colored" and they are 6000k+ with bases that allow them to fit either D2R or D2S, as you said.

Maybe the confusion is with the old frosted Xenons on early C32's etc. I've never had a failure so I have no experience. I was hoping Trey would comment because I know he has changed out lamps on his OE BiX.
Had a 2002 Acura TL several years back. It used D2R HIDs. Read up a lot on them then.

I did notice that one of my oe bi-xenon headlamp lenses is almost like spiderwebbing in the plastic. What is the cause of this and how could it be fixed? I heard of sanding but I'm afraid to make matters worse!







