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E63 / E64 6 Series (2004 - 2010)
The E63/E64 BMW 6 Series builds on BMW's sporty heritage with aggressive lines and an incredible motor to back the design up. Available in coupe and convertible trims with a standard 4.8 liter engine producing 360 horsepower and 360 lb-ft of torque, the 6-series is a popular choice that exceeds expectations.

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Old 01-30-2015, 04:15 AM
the_bambs the_bambs is offline
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Location: London
Join Date: Jan 2015
Posts: 1
Mein Auto: BMW 645ci (04)
iDrive / Audio stutters (takes ages to work)

Wasn't sure whether to post this in audio or in here.

I've got a 04 645CI. In the last few months the iDrive dash takes ages to let you do anything, the central knob just freely spins with no tension.

Music that should be playing from when the car starts only gives split second snippets then cuts back out.... it can do this for 5/10/20 minutes before everything just magically starts to work normally.

I originally thought it was the cold (London) but we have normal weather days and it's still an issue. (Going on for about 4/5 months)

Don't suppose anyones had the same issue or knows what the fault is?
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Old 01-30-2015, 08:49 AM
HerbP HerbP is offline
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Location: Georgia
Join Date: Jul 2009
Posts: 2,896
Mein Auto: 2005 645Ci & 2007 750Li
Your battery most likely needs charging or replacing. Your battery voltage needs to stay above 12 volts for the car to operate properly. Try measuring your voltage when the car has set overnight, then measure the voltage with the engine off. With the engine running, you should get 14.24 volts.

The battery voltage is critical on a BMW. It will cause all kinds of problems!

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645, 6series, audio, idrive, music, nav

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