I might also add that if you want to speed up the glowing process for your IDI diesel, consider getting a new glow plug relay. Nowadays they come with afterglow which significantly cuts down on necessary preglowing.

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2004 VW Jetta TDI (manual)

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