I had a problem with my 2008 +4, which turned out to be the two bolts holding the centre plate to the rack had worked loose.
I was driving my mother's '58 Vauxhall Velox when the steering box came completely loose. It could turn left because it blocked at some point but could not turn right. Fortunately I had just turned left on a slow corner when it happened and was able to stop without mishap.
Funny how this turned out to be all my fault (according to

Mum).
That car could really go. We lived on the outskirts of Sydney, 5 miles from the nearest town, I remember sitting in the passenger seat and watching the speedo hit 90 mph on several occasions(this was before Australia went metric. In later life Mum always denied she drove so fast. Once she had a "let off" from a "nice policeman" when she told him she was still getting used to the car and it was so difficult to keep it under 30 in top gear, I think she had only been doing about 50 on that occasion. At that time 50 mph was the speed limit for the open highway and 30 mph was the speed limit in built up areas. How things have changed. In that same stretch of road there are probably now 5 differnt speed limits and about 15 changes of speed limit. One never knows what speed one should be doing!