560SL (107.048) V8-5.6L (117.967) (1989)
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9. Set both outer operating levers upwards and insert the assembly aid (23) into levers of flap actuation.
NOTE: When adjusting the connecting lever (11) without assembly aid (23), push both flap actuations in direction of arrow up to stop and hold in
this position. The assembly aid is inserted only in replacement heater box.