Hi, all. What is the preferred plug for this car? It has the original plugs with 30,000 miles and 5 years on them. I understand that they should be changed after four years. The original plugs are Bosch F8DPER. A local M-B dealer says to use F8DPP332 plugs. The Bosch website lists 4301 and 4418 as alternatives to the F8DPP322 but does not list the F8DPER. Any guidance will be appreciated.

Also, how in the heck do you get access to change the plugs? The job looks to be a real knuckle buster. TIA.

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Dan
1998 C43