2022 GLA220 H247 8G-DCT Wet Dual Clutch Automatic Transmission Assembly

Overview: MERCEDES-BENZ's transverse 8-speed dual-clutch transmission with integrated electromechanical actuation.

Key Features:

• Wet Clutch System: Dual 7-plate clutch packs (0.5mm runout tolerance)

• Torque Capacity: 400Nm (optimized for M260 2.0L turbo)

• Mechatronic Unit: Direct-mounted TCU with predictive shift strategy

Failure Modes:

• Clutch Contamination: Degraded MB 236.21 fluid causes shudder (P0730)

• Valve Body Wear: Shift solenoids stick in cold (delayed 1-2 shifts)

• Input Shaft Bearing Failure: Metal debris in fluid (whining noise)

Critical Service Notes:

1. Fluid Specification: MB 236.21 ONLY (5.8L capacity)

2. Adaptation Reset: Required after clutch service (XENTRY mandatory)

3. Clutch Runout Check: >0.3mm requires pack replacement

Pro Tip: Monitor "clutch adaptation values" in XENTRY – exceeding ±15% indicates wear.