Why won't my Honda Jazz's parking brake hold the car on a slope?

The parking brake on my Honda Jazz (58 plate, 9000 miles) does not hold the car on anything more than a modest uphill slope. The dealer has "adjusted" it twice and checked it on the 'roller'. He says it meets MOT standard and that eight clicks of the handbrake should be sufficient. On a steep hill it does not hold fully even with ten clicks.

Asked on 25 July 2010 by Jack Holroyd

Answered by Honest John
Yes, this is a known problem. See car-by-car breakdown.
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