AUX input device for C5II audio?

[Citroenmad]

What does anyone with a C5II (facelift) use to connect an Ipod or similar to their cars audio system?

In the C5I I have a connects2, which is ok but not brilliant as the volume is very low.

After having the radio out of my C5II, there is very little room behind the dash/radio for an extra box from a connects2. Also, the C5II having a different radio to a C5I means the connects2 I have will not fit.