The only thing I noticed after jumping my rheostat,
is that the bulbs in the heater knobs get a bit warm.
The oil line is another story, I didn't tighten mine afterwards - talk about a mess.
I had light but oil an my shoes. But that's how you learn.

Good luck
Wolfgang

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Wolfgang Marquardt
1982 240D, 270K
1983 Ford F100, 260K