[color=#5D5D5D][font=tahoma, arial, verdana, sans-serif][size=2]Just fitted Ambient lights to the Interior light cluster of my Mk4 Mondi Edge total cost well under 10!! and takes less than half hour to make up and fit![/size][/font][/color]
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Marlin
2x Mono 3.5 jack plugs 2.18 (just need plastic covers)

[url="http://ebay.com/"]eBay[/url] (phenoptix)
1x 5 Pack Bright Orange pre-wired 12v LEDs (Various Colours) 1.89 free P&P[/size][/font][/color]
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[color=#5D5D5D][font=tahoma, arial, verdana, sans-serif][size=2]Total 4.07 if you had to buy everything still would be under 7

Bits From my Bits and Bobs Tin
Speaker Cable about 8inches is plenty
1x Male mini Spade
1x Female mini Spade
Blu Tack
Heat shrink Tubing

1. Remove silver part of phono plugs and discard them

2. Place a small ball Of blu tack around each of the LEDs at the point where the heat shrink ends and the cable starts this stops them moving in covers

3.Thread each LED into a plastic sleeve gently push bulb until it just at the end of the sleeve

4. Strip the wire back on both LEDs and separate speaker wire and strip about quarter inch off both ends

5. Twist both live wires and live speaker cable together cover with heatshrink and heat to seal joint now do same with negative

6. On other end of your cable get your live and crimp the female mini spade onto it and crimp female onto negative cable.

7. Remove interior light held in place by metal spring clip at front end

8. Reach inside the hole and on the passenger side just before the dome of the sunglasses holder there is a brown wire with a long thin White plug (female mini spade) gentlely pull this free and connect your male spade

9. Look into the interior light from the passenger side and you will see a male mini spade pointing towards you connect your female plug here.

10. Turn on lights to test and if so slot both plasic sleeves into the holders at each end of interior light tidy up the cableing and push back into it's home. Half hour start to finish tops. [/size][/font][/color]