Haven't bought through a CPO program, the cars I bought used, that weren't demos, I took to be inspected by my mechanic, and for my Mazda5, bought their extended warranty for around $1200 for 150,000kms I think. But when looking at the CPO program for MB, it seems they average $4000-$6000 more than other dealers, some really excessive, but they do offer a lower 0.9% interest rate and 120k warranty. Any thoughts ? Seems excessive....