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#1
07-19-2003, 09:06 PM
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300CE won't accelerate on 100 deg. day.
This is my first summer with the 300CE. A few times while driving in really hot weather (about 100 degrees) it has refused to accelerate from a stop. The problem is intermittent and it's only happened about five times so far.
I can't quite tell if the car just has no power, is in the wrong gear (failed to downshift when I stopped), or what. It doesn't shake like the engine is about to stall. It doesn't cough or sputter when I hit the gas, it just doesn't go anywhere. If I stand on the accelerator and force a downshift to 1st gear, the car will accelerate, although it is sluggish at tip-in. Once it gets to about 1000 RPMs it's back to normal. Again, it only seems to happen on really hot days in mild stop-and go driving. (City streets, but not gridlock - I'm in Oklahoma) I'm running the A/C full-blast, but coolant temp is normal. Is it simply time for a tune-up? I can't verify whether the PO did one.
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Jay 1998 S320 
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#2
07-19-2003, 11:27 PM
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Check your fuel pump output -- I had an Audi Fox that exhibited similar symptoms (although it usually quit completely most of the time) when the fuel pump was going out. Worked fine until I got to Tulsa on a long trip -- croaked on the freeway in rush hour traffic in a construction zone. When it (and we) cooled off, it was fine.
Certainly sounds like a fuel problem. Peter
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1972 220D ?? miles 1988 300E 200,012 1987 300D Turbo killed 9/25/07, 275,000 miles 1985 Volvo 740 GLE Turobodiesel 218,000 1972 280 SE 4.5 165, 000 - It runs!
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#3
07-19-2003, 11:57 PM
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Also, Check your coolant temp. sensor. Mine did the same thing and I found the connection was loose.
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Brandon 2008 S550 1957 Dodge D100 1967 VW Microbus 21 Window 2001 Suburban 2004 Beach cruiser bicycle -----------------GO DUKE!----------------- "It cannot be emphasized too strongly or too often that this great nation was founded not by religionists, but by Christians; not on religion, but on the Gospel of Jesus Christ. For that reason alone, people of other faiths have been afforded freedom of worship here." Patrick Henry 1776
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#4
07-20-2003, 12:15 AM
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Okay, I noticed something else today that I figured was unrelated, but it might be worth mentioning just for giggles...
My fuel gage has started jumping erratically. Basically it will drop to the bottom for a second and then back to normal, or jitter several times between normal and empty. I expect it's just an intermittent electrical connection. I recently repaired the speedo, so I could have screwed something up when I reassembled the panel. Even a small chance there could be a connection?
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Jay 1998 S320
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