w211 e320 cdi voltage variation

Discussion in 'Electronics' started by davidhem, Sep 2, 2011.

  1. davidhem

    davidhem New Member

    Jul 24, 2010
    Hello guys

    I have a 2003 e320 cdi estate, I have recently started getting lots of error messages coming up, srs, rear brake light bulb, faulty dash lights etc, beeping from the front front parking sensors even when driving along at speed.

    I realised that these messages were the symptom of something else rather than being actual faults, I checked replaced the rear battery as it wasn't dead but was on its way out.

    I then started monitoring the voltage on the dash and noticed that sometimes it would drop from 14v to 11, and on the odd occasion no voltage at all, but I mean so briefly it would be less than a second.

    I am looking for advice, the alternator was reconditioned a year ago, but I don't know whether they replaced the Voltage regulator.

    Any ideas, bad earth? VR? BCM?

    anyone else had this problem?

    many thanks


Share This Page

  1. This site uses cookies to help personalise content, tailor your experience and to keep you logged in if you register.
    By continuing to use this site, you are consenting to our use of cookies.