itschase

Just in case anyone here works on their own cars like I do - I wanted to post this handy reference guide from sylvania.com. Might save someone the trouble of having to figure this out on their own. As a previous BMW owner, I miss the incredible resources available on those forums. So I will do what I can here.

The part numbers here aren't necessarily proprietary to sylvania, just the letter additions at the end like XV, CB, or ST. Read the notes.

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W221 MERCEDES-BENZ S-class

Low beam headlamp
HID-D1S

High beam headlamp
H7
H7SU Silverstar ULTRA for Ultra Night Vision - The Whitest and Brightest Halogen
H7ST Silverstar High Performance Lighting: The Whiter and Brighter Halogen
H7XV XtraVision Halogen - The Brighter Light
H7CB Cool Blue Halogen - The Whiter Light

Parking light
2825
2825LL Long Life Upgrade: Up to twice the life of the standard lamp

Front turn signal
5200

Rear turn signal
12271NA

Tail light
LED

Stop light
LED

High mount stop light
LED

Fog/Driving light
H11
H11XV XtraVision Halogen - The Brighter Light

License plate
2825
2825LL Long Life Upgrade: Up to twice the life of the standard lamp

Front sidemarker
2825
2825LL Long Life Upgrade: Up to twice the life of the standard lamp

Rear sidemarker
LED

Map light
64132

Dome light
2886X
6486X

Step/Courtesy light
2825
2825LL Long Life Upgrade: Up to twice the life of the standard lamp

Trunk/Cargo area
2825
2825LL Long Life Upgrade: Up to twice the life of the standard lamp

trumpet1

My front left headlights have been flickering for months. I believe it is because the parts are shorting out as this headlight housing has trapped water since day one. They can't seem to see this when it is at the shop so they won't replace it (yet). I bet I can get it done before the warranty is over.

itschase

Sounds like an easy fix or an expensive ballast. Or both! But yeah, I would only take my car to the dealer if it was on a flatbed. Warranty or not, driving a loaner car is a punishment.

EDIT:

I forgot to mention that if you are trying to replace any of the 2825 bulbs, you might have better luck looking up type-194 instead. This seems to be the exact same bulb, but different part number and more common.