mrc8ds

Hi Guys

I have a 05 c180k w203 sedan. I have a few questions:

I recently went to get my service done and the garage put in Total Quartz 10w-40, is this the right engine oil for my car? It meets mb 229.1 standards but i would have thought it should met 229.3? Im thinking about changing the oil, what would be a good choice? Mobile 1 0w-40?

Secondly, i get an engine misfire going about 50km/h. 4 new spark plugs were changed 4 months ago and i run on premium fuel. To my knowledge, spark plugs shouldn't fail after 4 months. What else could be causing the misfire?

Thanks

Plutoe

RE oil----follow what the mfg states!!


RE misfire---could be loads of things like wires, coils and knock sensors!!


You have all the diagnostic equipment---correct??