...So, any issues I need to look for besides the coolant Valley Leak?

Buddy of mine who owns dealership is offering it to me for $24,000 with 34K Miles, one owner in Vancouver, BC. Traded in at Mercedes of Vancouver. Definite Asian soccer mom style lol.

4.8i V8, heads up display, premium audio, air suspension, rear DVD system, power liftgate, backup sensors & camera... pretty much loaded w/ options. Going to replace stock wheels anyways, so don't mind lack of sport package wheels.

Should I purchase the 48 month, 48,000 mile powertrain warranty for $2,888?

I've had a couple friends recommend the warranty. Any input would be appreciated!!