Hi there i have x166 2014y 3.5diesel ​​​​​​I got engine oil leak on gearbox side so i took off gearbox changed crankshaft seal.now put everything back and car wont start and gearbox show p for 2sec and then its turn Grey and no gear is selected it show Messeng whitout changing gears consult workshopCant connect to gearbox but engine and other modules connect whit no problems chacked all fuse ok.What can be problem?