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Home >> Audi >> 2008 >> A4 Base, 2D Convertible >> Repair and Diagnosis >> Accessories & Equipment >> Gauges & Instrument Panels >> Electrical Equipment >> 94 Lights, Switches - Exterior >> Headlamps with High Intensity Gas Discharge HID Lamps - through 10.04 >> HID low beam headlamp bulb, replacing

HID low beam headlamp bulb, replacing

CAUTION:
  • HIGH VOLTAGE!
  • Always disconnect negative ( - ) battery terminal prior to working on parts of HID headlamp components marked with yellow "HIGH VOLTAGE" warning symbols.
  • The physical and mechanical properties of HID bulbs are very sensitive. Internal pressure of HID glass bulb may exceed 100 bar (in operation). Bulb temperature may exceed 700 degrees Celsius.
  • Danger of explosion and burning.
  • The control modules for HID lamps must never be operated (headlamps turned on) without an HID lamp.
  • HID bulbs must only be operated (headlamps turned on) when installed in the headlamp housing.
  • Always wear safety glasses and gloves when removing and installing HID bulb.
  • Never look directly at an operating HID bulb. The UV emissions of an HID bulb are approximately 2.5 times that of a comparable halogen bulb..

Removing 

Fig 1: Removing Screws And Retaining Clip
GW00021666Courtesy of VOLKSWAGEN UNITED STATES, INC.
Fig 2: Identifying Electrical Connection, Retaining Clip, And HID Headlamp Bulb
GW00021667Courtesy of VOLKSWAGEN UNITED STATES, INC.

Faulty HID headlamp bulb disposal → HID headlamp bulb, disposal 

Installing 

Install in reverse order of removal, noting the following:

CAUTION:
  • Do not touch glass portion of bulb with bare hands. Even the smallest amount of moisture and/or contaminants from fingers that evaporates on the bulb during operation can cause the glass to cloud over.
  • When installing housing cover, ensure proper seating. Water intrusion will damage headlamp.
NOTE:
  • Heed installation position: lug at top of bulb holder must engage in recess of HID headlamp bulb.
  • Secure HID headlamp bulb with retaining clip.
  • Secure housing cover with screws and retaining clip.
  • Install headlamp Installing .
  • Reconnect battery. Required steps Reconnecting .