The HID kit he purchased has 2 digital ballasts, 2 HID bulbs, 2 digital decoders, and an installation manual. The digital decoders help with European vehicles because of the onboard computer problems. The two HID xenon gas bulbs fit single beam headlights and are available in all different sizes.
If there are problems with lighting, check all the connections pictured below in the diagram.
Featured product: HID conversion kit plus decoder kit combo for European vehicles
Connect #2 with #4;
Connect #5 with #6;
Connect #1 with #7;
Connect #3 with stock 12V headlight lamp or fog light lamp socket.
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