Fitment notes: OEM size: 12V 12Ah AGM auxiliary battery (Mercedes AUX-type) · Location: engine compartment, right side (or near the main battery, depending on build) · Purpose: voltage support / backup power for critical electrical systems, including the electric brake booster and start-stop restart function
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Every control module on the 2025 Mercedes-Benz CLE300 — where it lives, replacement time, and what it takes to program a replacement. Modules marked dealer / factory tool won't work after a part swap alone — budget for programming.
Transmission Control Unit (TCU)2.5 hr R&Rsecurity gateway +1.0 hr▸ programming details
📍 Transmission housing, driver side near valve body
⚠️ Memory seat positions lost after replacement. Separate modules for driver and passenger seats.
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 2025 Mercedes-Benz CLE300 2.0L I4 Turbo and can vary by trim.
🔧 Database maintained under the daily editorial review of Chris Hackleman · Master Technician · 20+ years.