Fitment notes: DIN standard battery; diesel turbo requires higher CCA than gasoline models
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Every control module on the 1984-1989 Mercedes-Benz 190D — where it lives, replacement time, and what it takes to program a replacement.
Instrument Cluster (IC)1.2 hr R&Rno coding
📍 Behind instrument panel, center of dashboard
⚠️ Electromechanical unit with no electronic programming; odometer is mechanical gear-driven
Vacuum Pump Control Relay0.3 hr R&Rno coding
📍 Engine compartment, relay panel near battery
⚠️ Electromechanical relay for vacuum pump; no electronic control
Aftermarket tool coverage varies by software version and vehicle build — treat "aftermarket tool" rows as "usually possible" and verify against your tool maker's coverage list before promising a customer. Spot a wrong location or hour? Tell us — corrections ship fast here.
Size-standard part numbers — verify your connector type before buying. Rear blades are model-specific; check the package's vehicle list.
Fuel economy figures are EPA data via fueleconomy.gov (median across matching trims). Performance figures are compiled estimates for the 1989 Mercedes-Benz 190D 2.5L I5 Diesel Turbo and can vary by trim.
🔧 Database maintained under the daily editorial review of Chris Hackleman · Master Technician · 20+ years and Jeff Moore · Master Lexus & Toyota Mechanic · 20+ years.