Fitment notes: European DIN sizing; battery located under hood on right side
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Every control module on the 1988-1989 Mercedes-Benz 300CE — where it lives, replacement time, and what it takes to program a replacement.
Climate Control Module (KE)2.0 hr R&Rno coding
📍 Behind center dashboard climate control panel
⚠️ Electronic climate control; self-calibrating; may require manual recalibration procedure via button sequence
Instrument Cluster (IC)1.5 hr R&Rno coding
📍 Dashboard behind instrument panel
⚠️ Analog cluster with electronic odometer; no VIN-locking in this era; mileage stored in cluster only
Transmission Control Unit (TCU)1.5 hr R&Rrelearn only +0.3 hr▸ programming details
📍 Under driver's seat or center console area
🔧 Mercedes HHT or Bosch KTS
⚠️ 4-speed automatic (722.3/722.4); shift point adaptation required after replacement
Engine Control Unit (ECU)1.2 hr R&Rrelearn only +0.3 hr▸ programming details
📍 Engine compartment, left side firewall near brake booster
🔧 Bosch KTS or Mercedes HHT
⚠️ Bosch KE-Jetronic with electronic control; idle speed and basic adaptations only; fault code reading via 38-pin connector
Anti-Lock Brake System Control Unit (ABS)1.0 hr R&Rno coding
📍 Engine compartment, right side near fender or under hood near master cylinder
⚠️ Bosch ABS 2 system; self-calibrating after installation; fault codes readable via blink codes or scan tool
Supplemental Restraint System Control Unit (SRS)0.8 hr R&Rno coding
📍 Center console area beneath shifter or under front seats
⚠️ Driver airbag only on 1988-1989 models; no coding required but fault memory should be cleared after replacement
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 1988 Mercedes-Benz 300CE 3.0L I6 and can vary by trim.
🔧 Database maintained under the daily editorial review of Chris Hackleman · Master Technician · 20+ years and Jeff Moore · Master Mechanic · 20+ years.