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1997 Mercedes-Benz E420 4.2L Poor Idle Quality
Posted to European Driveability on 2/3/2012 7 Replies

Try this one out, car came in with high idle, engine light on, replaced air flow meter, clear light, car comes back 2 days later same problem,replace eta with known good unit, still have high idle, spray carb cleaner under intake car stalls, remove intake repl...

FIX posted 2/20/2012

7 Replies Received (View Replies)

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car Vehicle Data

1997 Mercedes-Benz E420

VIN WDBJF72F0V
Engine4.2 L / 8 cyl / GAS
Trans5-speed Automatic (Electronic)
DeliveryFuel Injection / me1
EmissionsOBD-II Compliant
SymptomsPoor Idle Quality
OccursHot, Idle

Trouble Codes

P0507Idle Speed Control System Higher Than Expected