D4

I bought a D4 in Kampala Uganda done only 125,000km about 75,000 miles and after just 2 weeks the aircon failed, not surprised with those 3 sunroofs it’s too hot to drive unless permanent aircon. 2 independent aircon specialists said needed new pump. So mechanic fitted it. 2 weeks and 250 km later I heard a turbo leak, got louder and smelt exhaust in cabin. Mechanic told me the turbo cross pipe is cracked needs new one. Said this happens due to heat, I think he broke it while fitting the aircon pump. Any mechanic out there tell me if they are close to each other? Easy to break when working on aircon?