I recently took in my 2016 passenger to local MB dealer for recall service of fuel line. I had previously had this done prior to 36K warranty expiration. After first service under warranty the fuel smell issue was resolved. After the recall repair the smell returned!!! Has anyone else had this occur?? I have since return twice to have fixed but to no avail. Howis it possible that the real fix makes the problem return??? Fuel smells now emanating from ventilation system rather than wafting up from footwell. Has anyone else had this issue on there 2016 and if so found a solution? my local dealer is saying they can't find any reason for smell. However do agree the smell was present. So far it is most prevalent as start up and abrupt stops. Presumably when gas sloshes in tank.