1. Flexible and easy to use.Perfect match with the car 2. and Nice qulity, durable to use. 3. Built to quality control standards.Not easy to damage, long service life 4. Stable performance, high reliability.a perfect replacement for your old ones 5.This replacement ballast is 100% compatible and a direct replacement for your existing part. Designed to meet or exceed specifications. Plug-and-play installation with no need to program or code the car. Fits either the left or right headlight. Name:Car D1S Headlight HID Ballast Control Unit Module and high quality. Fitment Type: Direct Replacement Install Part Number : 5DC00906000 5DC009060-00 A2118705585 Placement on Vehicle:Left Right Fitment: For W211 S211 For 2007-2010 For 2010-2013 For E Class W211 2003-2009 For E Class S211 2003-2009 For E320 3.0L V6 Automatic Bluetec 2007, 2008 For E350 3.5L V6 Automatic 4Matic 2007, 2008 For E350 3.5L V6 Automatic Base 2007, 2008 For E550 5.5L Automatic 4Matic 2007, 2008 For E550 5.5L Automatic Base 2007, 2008 For E63 6.3L Automatic Base 2007, 2008 Colour:Silver Material:Metal Package Contents: 1 x Car HID Headlight Module Ballast Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.