clk270 gear problems

[GLclk]

hi
on my clk270 w209 (gaerbox 722.6..) dash cluster is not showing a gears (P,R,N,D and C,S)
gearbox not changing gears
when mowe gear selector down to N or D can't mowe it back to R and P, after switching ignition off leaver mowe back to P
already replace gearselector, gearbox control unit, gearbox conductor plate and plug and oil with filter...

any ideas?? fuse box?? ecu??