The E39 520 seems to have suddenly started disliking the 3rd gear. When driving, and shift to 3rd, half the time after driving for a random amount of time, the gear will simply drop back to manual. This seems to happen especially when slow driving. It doesn't happen in any other gear position. Also resting my hand on the gear stick in 3rd means it will randomly drop out of 3rd and I find that I can easily get it out of 3rd without depressing the cluth by just gently pulling on the lever. Again this doesn't happen in any other gear position.
Anyone know of this problem, how to fix it and what i'm looking to lay out to fix it
Thanks