Newbie alert! My 2012 (212) E-class has a problem with the PARKTRONIC, the front end (usually just the driver's side, sometimes both sides) gives false positives. It started out as an intermittent problem, mainly in wet weather, but has gradually got worse and is now pretty much constant, so much so that I have to switch the system off almost every time I drive. My local MB dealer as well as an indy both quoted me about £150 just to diagnose the problem, apparently figuring out which of the sensors is faulty (if any, or if all, or if it's something else) is time consuming and generally a hassle. Although the dealer did say that if I then get it repaired there, they'll credit me half the cost of the diagnosis, so I guess that's not too bad. Anyway, before I start shelling out my hard-earned money I thought I'd ask if anyone has any words of wisdom to share? I realise it's difficult to remote-diagnose over the internet, but any thoughts on what it could be, eg. is there a known issue with this model? All pointers welcome, thanks in advance!