For something changed so infrequently, I would stick to the OEM's.I am at a 100K and am changing the plugs and the wires. I can't seem to find bosch 7422 at my local auto store, but noticed they have a large selection of NGK.
Anyone know what the NGK equivalent plug is for the bosch 7422.
How come you're so married to fleabay? Autohausaz.com has them for under $54 delivered...Your Parts Search Returned 1 Part(s)(12) Bosch replacements for like $68.50 delivered:
Mercedes Benz E320 BOSCH 12 pcs Spark Plug Set - Plugs - eBay (item 120645462967 end time Dec-09-10 14:22:16 PST)
My school I don't replace spark plug wires unless I have too - and the 17mm spark plug boot tool/wrench really saves my time and knuckles on this job for like $30.
Keep the beat !
..OP, if you really want NGK, you want the 2647, which like the OEM plug is dual-platinum. The 7090 (sometimes suggested on the forum) is only single platinum, which at the least means it won't last as long. ...