No, the tank was at least 3/4 full. It has only happened two times in my life, and both times on my friends uphill driveway. I am sure it is siphoning the fuel back out of the filter, and if that is happening, then air must be coming in somewhere. I just can't figure out where.

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1991 300D 172,000 (totaled)
1998 E300 Turbodiesel 82,500