OK, So my car didn't sound right and I got the car towed to my local dealer. Two days later, I get a call from the dealer. First they ask if I had work done elsewhere. I said yes, I had the Haldex serviced elsewhere. Then she tells me that whoever worked on the car must've drained the rear differential as well as the Haldex and apparently it's been running without differential oil for over a year. Does anyone know if this is possible? The garage that serviced my Haldex said that the car wouldn't drive without differential oil for longer than a day, never mind 14 months or so! Anyone know something about this? Luckily the last time was in was with the same dealer when I said there was suspected Haldex fault and they said it was fine, so I'm going to call them back and argue this point. By the way they quoted north of £3,800 for new rear differential and Haldex system!