Andrew, If the tank vent is plugged, at highway speed a vacuum will build in the tank because the time-rate of fuel consumption is high.
When you slow down and engine RPM drops, the fuel lift pump cannot overcome the vacuum in the tank and so your engine is starved of fuel. Test: Drive at high speed long enough to cause the condition based on past experience, then pull over and quickly remove the fuel cap. If you hear a 'whoosh' of air, the tank vent is plugged. -- Very respectfully, /s/ Max Dillon '87 300TD, 310k miles Charleston SC Digest lurker (on and off) since 2001 _______________________________________ http://www.okiebenz.com For new parts see official list sponsor: http://www.buymbparts.com/ For used parts email [EMAIL PROTECTED] To Unsubscribe or change delivery options go to: http://okiebenz.com/mailman/listinfo/mercedes_okiebenz.com
