RPM @ Idle

anyhow noticed that at idle, the rpm is barely breaking 500.. seems kinda low to me, and it seems to be a little rough and audible, altho not sure if that's just in my mind after seeing the 500rpm reading. just wondering what RPM other owner's are seeing @ idle. thx.
seemed kinda low to me but i guess that's the norm here. but i swear the engine idle is a bit rough sounding.. my old w203 was prolly around 800-ish. that was the kompressor.
for those with a previous w203 V6 do you recall if the idle speed was the same?
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