I have a 55 plate altea 2.0 TDI, and today the car isnt going into gears 2 and 4 properly when shifting down without a good shove. The "top" gears 1,3,5 and Reverse are fine, but just 2 and 4 are playing up. If i pull away, it goes in ok, though feels like it doesnt go all the way home. On the way down, it doesnt quite go into gear, when i release the clutch, it sometimes pushes all the way home, or it kicks it out of gear. If i give it a good shove into position, it stays every time. Im guessing linkage, but not sure what to check. Any tips or guides on how to get to the linkage?