2010-2013 Genuine Original Factory Fit OEM Mercedes-Benz S-Class Klass W221 S280 S300 S350 S400 S420 S450 S550 S500 S600 S63 S65 Headlights RHD LHD Headlamp HID D1S Ballast (Xenon Light Control Unit / Module / Controller / ECU / Computer / Starter / Electronic Unit / Steuergerät /Inverter ) , Turn Signal DRL Control Module , D1S Xenon Bulb Globes , Wires Cable Harness , Projector Reflektor Bowls, Plastic Lens Cover , Replacement Sale

Part will fit : Driver side / Passenger side / Left / Light / Front (Fifth generation Facelift)

Mercedes-Benz S-Class W221 : 4-door sedan , Saloon

Engine
Petrol:
3.0–3.5 L M272 V6
3.5 L M272 V6 hybrid
4.7–5.5 L M273 V8
5.5 L M157 twin-turbo V8
6.2 L M156 V8
5.5–6.0 L M275 twin-turbo V12
Diesel:
2.1 L OM651 turbo I4
3.0 L OM642 turbo V6
3.0 L OM642 turbo V6 hybrid
4.0 L OM629 twin-turbo V8
Electric motor 20 hp (15 kW) Additional AC permanent-magnet synchronous electric motor

If your 2010-2013 Mercedes-Benz S-Class W221 S250 S320 S280 S400 S300 S420 S430 S500 S600 S63 S65 OEM HID Adaptive Bi-Xenon Headlight low beam or Headlamp projector housing high beam have problems, like light failed failure, flicker , bad , dipped beam very dim dimmer, dimming , got wet , getting dimmer, not working, flickering blinking , goes one and off , keeps going out , flashlight , beam pattern problems , making noise , not bright enough , not focused , stopped working , turning yellow and the dashboard displayer have warning light , error code , color inconsistency , color temperature , go up and down , moving up and donw , pointing down , overheating , distance control defective , leveling malfuncation ,turning pink , condensation , not turning off , gone ping , turned purple ,turned pink , trasig , not bright enough , flashing . warning light ,not working properly , adaptive function failure , keeps burning out , retrofitting challenges , have any other fault issues, troubleshooting , you only need to change or replace related original led xenon parts like: repair tips , transformer ballast, xenon bulb, control unit driver module , reflector , glare shield , waterproof , igniter , or wiring wire harness cable to repair and fix your xenon led headlamps is ok, no need to cost a lot of money to buy a whole brand new headlight assembly like the car dealer suggest.


Normally speaking, when your headlight have problem, check out the fuse first, if it’s ok, then replace the factory fit xenon control unit box ballast is ok, because from our many years experience, when the headlight not work, 90% of the problem is on the ballast.