my 300E appears to have a vac leak when in D ot R and idleing as the economy gauge goes to the middle 6 o clock.


but in park it goes to the left where it should be


I replaced a few vac lines and the ISC hoses,breather hoses,pcv hose

bump

Idling while in Gear?

My economy gauge does the same -- moves to the left in park and neutral.
It is nornal; when in gear, there is an increased load on the engine, thus the increased fuel requirement.

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2008 E350 4matic / Black/Anthracite

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Gone but not Forgotten:
2001 E430 4matic, 206,xxx miles, Black/Charcoal
1995 E320, 252,xxx miles, Black/Grey
1989 260E, 223,00 miles, Black/Black