My father has a 2001 E320 RWD pushing 175k miles. NO engine issues whatsoever, engine does not burn oil or smoke either. I personally had a 2001 C320 RWD, similar if not the same engine with approx 160k miles. Engine have me no issues. Did not burn oil and did not smoke either. Both were well maintained & both bought used

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2001 E55

2001 E320 Sedan

2001 Subaru Legacy

2006 SLK280

2016 Subaru Outback 3.6