Cadillac SRX until BJ 2010, what do you have to pay attention to?

I just bought a SRX (Facelift version from 2009) with the 3.6 liter engine from first hand with less than 30 TKM. Can anyone tell me about their experiences? Any things I have to pay special attention to? Are the engines vulnerable or should I have something preventively replaced or kept waiting? Thanks for a short feedback!