Analog Tele Aid units are no longer supported and must be updated to digital, preferably at a dealership or a well-equipped independent shop. The update and all related factors should be completed at the same time.
Car Problem Reports
Mercedes-Benz S430 Analog Tele Aid Units Are no Longer Supported
Mercedes-Benz S430 Problem
Average Mileage: 68,300 mi (62,000 mi - 74,600 mi)