Hi,

I have a 1987 300E and lately (last I month) I have started to notice a clicking noise from the engine, I coincides with the engine speed, if I step on the gas the noise gets faster. Its not a severe noise and I mostly here it in the garage where the noise echos back to me. I do use premium gas at all times and about 3 months ago ran some Techron cleaner in there as well. Any suggestions would be greatly appreciated.