The Mercedes S-Class W221 was offered with several xenon and adaptive-light systems and received a significant facelift. The W221 2006+ three-bar LED DRL projector headlight assembly requires chassis, production-date and factory-equipment verification.
Quick compatibility answer
The product targets W221 applications beginning in 2006, but fitment depends on standard versus long-wheelbase body, pre-facelift or facelift front end, original xenon/ILS equipment, connectors, modules and driving market.
W221 body and facelift checks
Confirm W221/V221 by VIN and compare the original lamp shape, bumper and grille. Registration year alone is unreliable around the facelift. A conversion between versions may need additional front-end parts.
Factory lighting equipment
- Xenon or Intelligent Light System configuration.
- Automatic leveling, washers and cornering functions.
- Ballast, igniter, LED driver and control-module numbers.
- High-beam assistance and regional adaptive behavior.
- Left-hand-drive or right-hand-drive beam orientation.
Coding and module plan
Installation may require original module transfer, adapters, coding or configuration. Confirm which original functions remain and whether all necessary electronics are included.
Installation workflow
- Scan and save existing lighting faults.
- Photograph labels, connectors and modules.
- Test-fit both housings before final fastening.
- Test every lighting and adaptive function.
- Complete coding if needed, rescan and align the beams.
Pre-order evidence
Provide VIN, build date, wheelbase/body, front photo, housing label, connector/module photos, country and current warnings. Request written fitment and packing-list confirmation.
Later-generation owners should use the W222 guide. Compare both in Best Mercedes S-Class Headlight Upgrade Options.
Frequently asked questions
Will this fit my Mercedes W221?
Fitment depends on production date, wheelbase/body, facelift version, original lighting system, connectors, modules and market.
Which year models are compatible?
The product is listed for 2006+ W221 applications. Confirm exact build date and pre-facelift or facelift lamp shape.
Does coding require any changes?
It may. Xenon, ILS and adaptive configurations can require module transfer, adapters or coding.
What modules are included?
Included ballasts, drivers, adapters and control units vary by version. Request a written packing list.
How difficult is installation?
This is an advanced retrofit requiring professional fitting, Mercedes diagnostics, function testing and beam alignment.
