How do you repair a 190e Mercedes wiper lever?

To repair a 190E Mercedes wiper lever, first, disconnect the vehicle's battery to ensure safety. Remove the steering column cover by unscrewing the necessary screws, then carefully detach the wiper lever from the steering column. Inspect the lever and its wiring for any visible damage, and replace any faulty components. Reassemble the column and reconnect the battery, testing the wiper function before fully securing everything.