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Old 01-21-2011, 09:57 PM
johnflight1's Avatar
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Join Date: Aug 2002
Location: Las Vegas Nevada
Posts: 260
No Fuel tank venting??

124 ,88 300E, fueled car early in the morning and came home.went to go out later that morning and the car had a heavy fuel smell, interior and trunk.
So I opened the fueling cap and out came about a quart of fuel under pressure.
I have been having this problem lately when I open the cap to refuel there is a great deal of pressure behind the cap when opening reguardless of the quantity of fuel remaining in the tank.
Should the fuel tank be under so much pressure?
Could I have a problem with the vapor recovery system?
The car has the original fuel cap which is a non vented type.
where is the tank vented to? ,and where is the vapor recovery canister located I have never seen one on this car.................Thanx John

88 W124 3.0
96 R129 119eng
06 ML350
98 ML320 sold
02 CLK55 amg
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Old 01-22-2011, 10:39 AM
Hirnbeiss's Avatar
ich fahre, also bin ich
Join Date: Mar 2002
Location: South Florida
Posts: 1,653
it has a vent, but no idea where on your car. maybe in line with the filler pipe? should have a check valve too.
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Old 01-22-2011, 04:38 PM
Join Date: Mar 2009
Location: Iceland
Posts: 423
There is a vent canister behind the left front fender. It's very likely your problem. PN:A1244700359

600SEL '91
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