You need extended length allen/hex bits

7 Pc 3/8 in. Drive Metric Long Reach Hex Bit Socket Set

Something like those. Use a breaker bar on them, from memory only the inner four hold the upper to lower together. I foresee a pressure washer in your future.



FYI, if you are emission exempt... TIG up the AIR injection bung on the top and the EGR on the bottom. Do not be shocked if the EGR is already plugged due to soot.

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'85 300SD 245k
'87 300SDL 251k
'90 300SEL 326k

Six others from BMW, GM, and Ford.

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