Blue Robin
From the M5, you have a couple of options:
1) Off at J6, north on the A449 through Kidderminster and then west on the A458.
or going from personal experience (as reported by many customers):
2) Off at J4, up the A491 to Hagley (passing through the gloriously named "Bell End"!), west onto the A456 (towards Kidderminster) and then right past Churchill and onto the A449 north.
Don't bother going through Kinver, the best bet is to stay on the A449 until you reach the A458 turnoff.