I am planning in a few months, when my car turns 2 years and the warranty by bmw is expired, to let modify the ecu of my 520d from 184hp/380nm to 215hp/430nm by a well reputed car tuner here in my neighborhood (take a look at his website:
www.autotuneheinz.be). Since the M performance package is twice the price for half the performance, I prefer this. Are there any arguments not to do this , since warranty will be expired anyway ?
I'm planning to sell this 520d when it has about 200.000km (when it's about 4-5 years old).