I've owned a '95 E420 for 7 years. Next to my '97 CL500, it is my dream car. Have had no problems. Changed the wiring harness but still has the original oil tubes and chain adjusters at 130K. You will get about 22MPG and around 15 in city driving. Oil tubes don't plug, they UNPLUG when the end cap comes off. This causes a "ticking" sound because oil is now deprived from a lifter. Simple thing to fix. On my Cl my choice was aluminum tubes at $27 or Benz original plastic ones a lot less. I opted for the plastic ones as the originals had lasted 16 years!
The Mercedes V-8 engines are absolutely magnificent! You will NOT be disappointed.
Anziani
'95 E420 129K
'97 CL500 135K