Couple of Questions

[Roughquest]

Hi Everyone,
1. Please advise when spark plugs should be changed
2. What is the idle speed on Mercedes R170 SLK 500 revs ?
Thanks!

 

[Roughquest]

Bump

 

[AMGeed]

1. Every 40k miles or 4 yrs IIRC. It should state this for certainty in your handbook.
2 Should be 750 -800 rpm.

 

[Roughquest]

:bannana: Thank you so much !