E212 = Too low voltage on drive regulator
E231 = Too low voltage on lift regulator
Check the 10 amp F62 fuse inside the motor compartment fuse box, also check the maxi fuses on both frequency convertors, if they show any signs of burning / blackness change them!
Check the K10 main contactor tip's are clean & making good contact.
It wouldn't hurt to clean all the electrical connectors to the A5, A1 & A2 cards under the armrest panel, the plugs on A5 are numbered so you cant mix them up.
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