My head lights brighten abs and brack lights come on the dash for a few seconds sometimes the abs light comes on and stays on and drains the battery
SOURCE: BMW warning lights: BRAKE, ABS and DSC
speedometer prabably stopped working also. ABS module shorted out. Will need to be rebuilt. Go to modulemaster.com. Put in your car info. The site will advise how to diagnose kind of. It will tell you how to remove unit and ship and how to protect the connector and valve body so you can still drive your car. This happened to my 2000 528i so i'm confident this is your problem. When you get the unit back just hook it up and away you go. Lights will go off on thier own right away. Dealer wants over 1000 bucks and will only sell you a new unit. This should be around $350 all said and done.
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