I have a 2001 SLK 320. It has 48k miles on it. I’ve bought it used in 2005. It had 6k miles on it when I bought it. So it spent its early years kept in a garage. For the next 5 years I have been driving it everyday to work, but my commute is short. So it only has 48k on it.
My question is when is a good time to replace the spark plugs, given my circumstances. The normal thing to do would be to replace them at 7th year, but I didn’t do it then because of the extreme low mileage. And then I forgot about it. Now it is 10 years old. I wonder you guys think?
I want to do the job myself. So my other question is what is the recommended “spark plug gap” for this car and what is the torque specification?