i've had my 2000 e320 for 2 years. bought with 20,000 miles, now has 58,000 miles. replaced a catalytic convertor, clock spring, shift interlock, all at different times. today, took the car in and the other convertor is bad plus 2 oxygen sensors. thank goodness all of this has been under warranty. also, they told me i need to have my axle seals replaced for $600. im thinking i better sell before something really happens. what do y'all think?