2nd Gear Member
Join Date: Apr 2005
Location: Montreal, Canada
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EWS stands for Electronische WegfahrSperre. In English that means Electronic Driveaway Protection.
Try disconnecting the battery for 30 minutes or resetting the codes.
The problem is between the DME (Digital Motor Electronics) a.k.a ECU and the EWS. I had this problem on my 325 when I first bought her this year. EWS came standard on all 95.5 and later e36's. See the attached file. The EWS works in conjunction with your key and a ring antenna (the plastic collar around the top of the ignition barrel). A signal is sent from key to ews, if there is a problem ews will not allow car to start. There is a technical service bulletin on this and your dealer should know about the problem
I went as far as changing ignition barrel and coding new keys. Changing my starter... and a whole bunch of other stuff because my non-start problem was intermittent.
I am not saying this will solve your problem but your issue sounds very similar to mine. I hope this information will help you narrow down the problem.
Good luck and tell us what happens.