Moin Moin in the forum, I have a problem with my climate. In the month 10/2014 I had new coolant and contrasting agent filled into my air conditioning of the thickness. The background was that the climate did not work anymore (VCDS error: too little coolant). A week after the filling had had had to check by means of UV lamp whether the coolant appeared somewhere. The result was negative and I thought everything would be io. Thinking!!! Unfortunately the climate fell out again today. Now a question to you. Where can the coolant leak out? I wasn’t there as if the contrast agent was visible by means of UV lamp. I assume that it must be rather hidden, otherwise the very reliable locksmith would have seen the location of the loss safely. Phaeton 3.0 V6 TDI BJ 2007 GP0 I am grateful for every tip.