According to law, you should ensure for Audi R8 normal work of light over license plate. With original voltage 12 V these lamps produce just 5 W of light. Audi installed in vehicles with motor 5.2 tiny lamps for this purpose. One more thing - Audi R8 4.2 needs only high quality optical devices. In this modification of R8 producer installed SV8.5-8 type of bulb base. These lights in 2010 model year cars with BYH motor code show the index at night.
Look out when you relieve old lamp in Audi and install new SV8.5-8 bulb. Some special tools are needed for 4.2 motor cars with engine code CNDA. More than 12 V of voltage and different capacity from 5 W will cause problems. If you can’t place the license plate lights in 2012 Audi R8, better contact the service. It’s not too easy to put new bulbs in Audi R8 over the plate.