Hi every one I writing the first time hire , I have read perhaps all posts about this problem in this forum but can,t solve the problem .
I have 2014 ED , few days ago brakes become hard and on screen is showing brake malfunction . I checked errors and finded two :
1.The vacuum pump has malfunction - there is short circuit to ground .
2.The electric relay of vacuum pump has a malfunction - there is an open circuit .
May be some body from you had the same situation or have any thought .
I have a lot of spare part from ED with bad battery so I changed vacuum pump then engine computer ( beyond the passanger seat ) , fuse box , both relays + and -
, checked all wire : on engine , under carpet , under floor , checked brake swich and sensors - no resalt .
The bigest problem - in my country there is no Smart car dealers , is Dimler but they do not trade or make service to Smart car ( am in EU , 1000 km from