Hi a few weeks ago I was asking about the location of my reverse light switch on my s type, as the reverse lights didn't work.i had a few replies and appreciated all of them...I started having trouble with the right rear indicator bulb and found out that the bulb cluster was at fault,,so I ordered one off Ebay and fitted it job done but to my surprise my reverse lights work also the parking sensors..I had one quote of £600 to remove gearbox to repair switch???so gents just check the bulb cluster in case it's that if you have same problems..