i'm curious what type oil your using.
i just switched to 5w40 synthetic Shell and it made a difference in starting.
i also made sure the glow plugs were good and cleaned the contacts on the glow plug relay. it was 19F yesterday morning and even though i wasn't driving it, i had to try to see how it started. fired right up when the indicator light went off.
roberto

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1985 300SD
1998 Jetta TDI
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