spark plug seizing?
 

I know the plug replacement is 100 k miles for a C230K but it will take me about 10-11 years to get there. Should I replace the plugs at 50 k miles just to avoid the seizing problem or am I worried for nothing? I plan to keep the car that long. Thanks.

Plug examination is an important diagnostic during regular preventative maintenance. Removing them should keep the threads clean and smooth.

Steve

I beleive its 4 years or 100k miles, whichever comes first.

Wait 10 years to pull the plugs and your going to strip all the threads in the head.