Yeah I've thought of the fuel filter, but I think if the filter was clogged the engine wouldn't just quit on the highway without any warning. I think I would first experience power loss and maybe rough idle, but that's not the case. The fuel cap looked fine the last time I saw it.

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2004 VW Jetta TDI (manual)

Past MB's: '96 E300D, '83 240D, '82 300D, '87 300D, '87 420SEL