Why doesn't Vauxhall want to know about my Meriva's ESP fault?

My Vauxhall Meriva's ESP light has been coming on and off since June 24. I phoned the RAC out three times, and they said the first and second time that the steering was ok, and then 10 minutes after the...

Steering committed

Sometime ago you recommended a portable steering wheel lock. What would be suitable for a Mercedes SLK200 kompressor that I have recently purchased?