After purchasing my 325xi, I found that the car didn't provide me with the excitement I hoped it would. After test driving the 135i, I instantly fell in love with it. I purchased the car with 19k miles as a Certified Preowned. The car is still covered under that factory and maintenance warranty for 6yr/100k miles.
I don't imagine I will post very many DIY or maintenance tips for a couple of years since it is still under warranty.