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Mercedes-Benz 722.9 7G-Tronic 8-Piece Solenoid Kit
Restore accurate hydraulic control and transmission shifting performance with this 8-piece Bosch OE solenoid kit for the Mercedes-Benz 722.9 7G-Tronic seven-speed automatic transmission. The kit includes solenoids for B1, B2, B3, K1, K2, K3, EPC and TCC circuits.
Kit reference: 88420K.
Transmission: 722.9. Verify the transmission version and original solenoid configuration before ordering.
if this fits your vehicle.
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Warranty Information
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Description
Mercedes-Benz 722.9 7G-Tronic Bosch 8-Piece Transmission Solenoid Kit
The Mercedes-Benz 722.9 7G-Tronic transmission uses electronically controlled hydraulic solenoids to regulate fluid pressure, clutch engagement and gear changes. These solenoids are essential to the transmission’s ability to deliver smooth and controlled shifting.
This eight-piece replacement kit contains Bosch original-equipment solenoids for the B1, B2, B3, K1, K2, K3, EPC and TCC circuits. It is designed for selected Mercedes-Benz vehicles equipped with the 722.9 seven-speed automatic transmission.
Key Features
- Eight Bosch original-equipment solenoids
- Designed for Mercedes-Benz 722.9 7G-Tronic transmissions
- Includes six clutch-related solenoids, one electronic pressure control solenoid and one torque converter clutch solenoid
- New replacement components
- Two solenoid identification types: black cap and blue cap
Kit Contents
| Component | Quantity | Reference |
|---|---|---|
| Black-cap solenoid | 4 | 220-277-1098 |
| Blue-cap solenoid | 4 | 220-277-0998 |
Solenoid Applications
- B1, K2, K3 and EPC: Black-cap solenoid application.
- B2, B3, K1 and TCC: Blue-cap solenoid application.
Common Symptoms of Solenoid Problems
- Harsh or delayed gear changes
- Erratic shifting between gears
- Transmission slipping or inconsistent clutch engagement
- Transmission entering limp mode
- Hydraulic pressure regulation faults
- Transmission-related diagnostic trouble codes
Vehicle Compatibility
The kit is listed for selected Mercedes-Benz vehicles equipped with the 722.9 seven-speed automatic transmission. Applications include selected C-Class, CL-Class, CLK-Class, CLS-Class, E-Class, G-Class, GL-Class, GLK-Class, ML-Class, R-Class, S-Class, SL-Class, SLK-Class and Sprinter vehicles.
Not every vehicle within these model ranges uses the same 722.9 transmission configuration. Confirm the transmission identification and solenoid requirements before ordering.
Installation Information
Installation requires access to the transmission valve body and should be performed by a qualified automatic transmission technician.
Inspect the valve body, electrical connections and transmission fluid condition during installation. Follow the vehicle-specific service procedure and perform any required diagnostic checks and adaptations after installation.
Product Specifications
| Specification | Details |
|---|---|
| Product Type | Automatic Transmission Solenoid Kit |
| Vehicle Make | Mercedes-Benz |
| Transmission Model | 722.9 7G-Tronic |
| Transmission Type | 7-Speed Automatic |
| Solenoid Manufacturer | Bosch |
| Condition | New |
| Kit Quantity | 8 Pieces |
| Solenoid Applications | B1, B2, B3, K1, K2, K3, EPC and TCC |
| Black-Cap Solenoids | 4 |
| Blue-Cap Solenoids | 4 |
| Retailer SKU | 88420K |
OE and Cross-Reference Numbers
| Reference Type | Part Number | Quantity |
|---|---|---|
| Bosch Solenoid Reference — Black Cap | 220-277-1098 | 4 |
| Bosch Solenoid Reference — Blue Cap | 220-277-0998 | 4 |
| Retailer Kit SKU | 88420K | 1 Kit |
Listed Vehicle Compatibility
| Mercedes-Benz Model | Listed Production Years | Additional Application Details |
|---|---|---|
| C-Class | 2004–2014 | W7C700 / W7B700 |
| CL-Class | 2004–2014 | W7X700 |
| CLC-Class | 2008–2011 | 2.5L / 3.5L |
| CLK-Class | 2004–2009 | 2.5L, 3.0L, 3.5L, 5.0L, 5.5L and 6.3L |
| CLS-Class | 2004–2014 | 722.9-equipped models |
| E-Class | 2004–2014 | W7A700 / W7B700 |
| G-Class | 2006–2014 | W7C700 / W7B700 |
| GL-Class | 2006–2014 | W7A700 / W7B700 |
| GLK-Class | 2008–2014 | W7A700 / W7B700 |
| ML-Class | 2005–2014 | W7A700 / W7B700 |
| R-Class | 2005–2014 | W7A700 / W7B700 |
| S-Class | 2005–2014 | W7A700 / W7B700 |
| SL-Class | 2005–2014 | W7C700 / K7B1000 |
| SLK-Class | 2005–2014 | W7C700 / K7B1000 |
| Sprinter | 2011–2014 | W7C700 / K7B1000 |
| Viano | 2014 | W7C700 / K7B1000 |
| Vito | 2014 | W7C700 / K7B1000 |
Fitment notice: The listed applications are the retailer's stated compatibility range, not a guarantee for every vehicle in those years. Confirm the 722.9 transmission, valve-body configuration and solenoid references against the vehicle VIN and original components.
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