A few weeks ago I was in a Mercedes only wrecking yard here
in California. A few cars had holes in the hoods, the hoods had melted.

I asked what had happened, it was shocking to see, I was told engine fire.

No more was said, I have no idea the cause.

But I am under my hood often enough that if something is not right
it will typically be caught early on.

The others here commenting on the specifics of fuel distribution seem to
have hit on something of major importance.

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80 300D 340K Owned 30 yrs
83 300SD 440K Owned 9 yrs - Daily Driver 150mi/day
02 Z71 Suburban 117,000
15 Toyota Prius 2600 miles
00 Harley Sportster 24k
09 Yamaha R6
03 Ninja 250