Thanks,Arthur, that makes sense. Unfortunately I don't have the code, never thought to get it after the readout said EGR flow problem (or something to that effect). And I just saw that the bolts are torx, and I don't have a set down here in FL, so it will have to wait until I get to Sears anyway. I appreciate your help, I'll post how it turns out,

Best,
g

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64 230sl, my daily driver
94 E500, sold
98 E320, family and dog hauler
04 C240, safe machine for teen drivers, but a poc
08 audi a4, yes we have gone to the dark side