So what is the matter with this switch, that it does not keep working right?
Does it last a few days then just pack in, and hill start fails to work again?
I cannot understand why mechanics cannot figure it out. Weird.
Hope they resolve it for you soon.
PS.......Not the first time i have seen 'impossible to fix' problems on cars.....
Interestingly I had a Vauxhall Tigra convertible for years, and no-one including Vauxhall or the Tigra forums could figure out where the resistor bank was, (it gives different voltages 12V, 9V, 6V and 3V) to get 4 speeds on the ventilation fan. Owners hunted high and low, stripping the dash and vent system down to find it. But never did
When my vent fan packed in with a burned out resistor bank, I had to put my own 'made in china off ebay' variable speed controller on the fan to get different speeds LOL. A real 'Heath Robinson' fix.
Mind you you cannot do a 'Heath Robinson' fix on a hill start system, as its a crucial safety feature, assuming it works