How do you replace ignition 0n 1990 190E Mercedes-Benz?

To replace the ignition switch on a 1990 Mercedes-Benz 190E, first disconnect the battery to ensure safety. Remove the steering column covers to access the ignition switch. Unscrew and disconnect the old ignition switch from the wiring harness, then install the new switch by reversing the process, ensuring everything is securely connected. Finally, reassemble the steering column covers and reconnect the battery.