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one point missing in this conversation is longevity.
Electric 5 years or ~70,000 miles before the batteries need to be replaced
Hybrid Only as long as the batteries survive ~100,000 miles.
Gasoline 10 to 20 years, ~200, 000 miles before the engine wears out if maintained
Diesel 20 to 40 years, ~600,000 miles before the engine wears out if maintained.
If you do not replace your care every five years the savings in owning a Diesel care go well beyond mileage.
The longevity of Diesel motors comes from the motors being more robust in construction but also because Diesel acts as a lubricant for the motor itself. Many older Mercedes diesels replace or rebuild the motors to keep going. Many have been driven in excess of a million miles and are still running.