I did my 300 SDL without taking the manifold or the IP lines off. It was a PITA, but it is very possible. I used a 1/4" drive set with various extensions, and a flex end, as well as a really long set of needle nose pliers. I didn't have the money for the gasket for the intake manifold, so I had to improvise. Time was worth less than money in that case.

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All it takes for evil to prevail is for good men to stand by and do nothing.

Too many people tip toe through life, never attempting or doing anything great, hoping to make it safely to death... Bob Proctor

'95 S320 LWB
'87 300SDL
'04 E500 wagon 4matic