I’ve recently bought a Fiat Doblo swb van and am trying to fit roof bars. Do the black bungs on the top of the van need to come out or do you screw the bolts through them.
Can find any info on utube and instructions are useless.
Thanks

Should unscrew, if I remember 6mm bolts.
They are plastic on the 3 Doblos we have owned all broke off, not a problem to drill out remnants & run a tap down thread to clean out, use copper slip on bolts