Coolant leak!!!

[L666tjh]

Hi there, recently purchased a 2006 Audi rs4 b7, lovely car and good mileage, after taking her for a little run on Saturday I returned to the car to find coolant near the front wheel, I've had the car on ramps today and had a good look about, I can't find the location of the leak but can see Coolant is dripping from a aluminium looking pipe above the gearbox, any one suffered from something similar or any advice would be great full thanks in advance tom

[Azmontana]

Could be heater matrix