My 240D has this problem where the glow plug relay cuts out too soon as evidenced by the audible click and hard cold starting. On the first cycle it usually clicks after 10 seconds. On subsequent cycles it only takes a couple seconds to hear the click. I was just wondering if I need a new relay or if there's something smaller that needs to be replaced.

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2004 VW Jetta TDI (manual)

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