RPM at on cold startup?

[nh2]

folks.

What is the correct RPM on starting cold on a 1998 w210 eclass 320 petrol?

mine seems to be 1300 for about a minute,, then it returns to normal (850)

no problems to report though just wondering if that's normal?

 

[jberks]

No its not. It should be the same all the time, irrespective of temperature.
Something to do with the cold start system but I don't know it well enough.

 

[kth286]

jberks

Sorry to say but you have that wrong - it IS temperature related, and the revs slow down as the engine gets up to temperature.

Regards

 

[dogsbody]

RPM at on cold startup

My E320 does exactly the same but settles down to 700-800 rpm within a few seconds - i regard this as normal as it happens summer and winter

 

[jberks]

folks.
mine seems to be 1300 for about a minute,, then it returns to normal (850)

Re-reading, there's truth in both statements. Yes, re-thinking about it, I was off beam and the revs do sit high for a few seconds, but 5-10, not 60.
I can't remember my 210 doing it though it might have done, the 211 doesn't, but the C220 certainly did.