Fitment notes: Battery located in engine compartment on passenger side; European DIN sizing may apply
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Every control module on the 1986-1992 Mercedes-Benz 300E — where it lives, replacement time, and what it takes to program a replacement.
Instrument Cluster (IC)2.0 hr R&Rrelearn only +0.2 hr▸ programming details
📍 Dashboard behind instrument panel
🔧 Mercedes HHT or manual odometer transfer
⚠️ Mileage stored in cluster; odometer gears must be physically transferred or recorded for legal compliance. No electronic VIN lock.
Climate Control Module (KE)1.8 hr R&Rno coding
📍 Behind center dashboard climate control panel
⚠️ Electronic climate control on equipped models; many base models have manual HVAC with no module.
Anti-Lock Brake System Control Unit (ABS)1.5 hr R&Rno coding
📍 Engine compartment, right side near fender or under driver seat (varies by year)
⚠️ Bosch ABS 2 or 2E system; no coding required but bleeding procedure critical. Early 1986-1987 may not have ABS.
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
⚠️ KE-Jetronic system; idle adaptation and basic fault code clearing required. Most 'coding' is mechanical idle adjustment.
Supplemental Restraint System Control Unit (SRS)1.0 hr R&Rno coding
📍 Center console area or under front passenger seat
⚠️ Introduced mid-1988 model year; earlier cars lack SRS entirely. Battery disconnect and wait 90 seconds mandatory.
Cruise Control Module (CC)0.8 hr R&Rno coding
📍 Engine compartment, near firewall or integrated with ECU
⚠️ Optional equipment; vacuum-actuated system with electronic control. Not present on all vehicles.
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 1987 Mercedes-Benz 300E 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.