Just to kind of wrap this up, I bought both an long nose angled hose plier and a "Mercedes Spark Plug Wire Wrench Tool M112 V6/M113 V8" (on ebay for $17.99 + $7.50). With both of those tools, plus long and short 4 mm allen wrenches and plug wrenches, the job was almost easy to accomplish. The old plugs were a bear to remove as all the threads were rusty. I coated the new plug threads with anti-sieze and coated the boots with silicone, so next time it will be much easier.

Anyway you figure it, it beats the heck out of paying our dealer the quoted $400 for a plug change, I got a couple of new tools out of the deal, and my daughter got a practical Christmas present.

Thanks for all the good advice! Much appreciated. Happy New Year to all.

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'76 240D-Sold
'78 240D-Sold
'85 300 SD, 165K-Sold
'88 300 TE, 165K-Sold
'64 Porsche 356C Cabriolet- under restoration
'86 560SL 124K Miles-Sold
'94 320E Wagon, 74K Miles-128K Miles JUNKED
'06 E350 Wagon, 84K Miles
07 SL550, 14K Miles