Description
Mercedes-Benz R129 Convertible Roof Control Module
OEM Part Number: 129 820 39 26
Also Known As: Soft Top Control Unit / Convertible Roof Module
Original factory Mercedes-Benz electronic control unit removed from a classic R129 SL.
This module is the central brain of the fully automatic soft top system and also incorporates the automatic roll bar deployment function.
At Oz’s Garage, we specialize in original OEM European classic electronics — not reproductions.
🔧 Product Specifications
-
Genuine Mercedes-Benz OEM
-
Part Number: 1298203926
-
2 electrical connectors
-
Controls:
-
Hydraulic soft top operation
-
Automatic roll bar deployment
-
-
Condition: Used
-
Professionally Tested
-
30-Day Functionality Warranty Optional Extended 90 Days Warranty
-
Unit Weight: 3.00 lbs
🔁 Interchange Part Numbers
129 820 31 26
1298203126
129820312680
129820392680
331444
334487
Please confirm part number match before ordering.
🚗 Compatible Vehicles (R129 Chassis)
| Model | Years |
|---|---|
| SL280 | 1995–1996 |
| SL300 | 1994–1995 |
| SL320 | 1995–1996 |
| SL500 | 1994–1996 |
| SL600 | 1994–1996 |
| SL73 AMG | 1994–1996 |
Chassis Code: R129
⚠ Common Failure Symptoms
-
Convertible top stops mid-cycle
-
No response from roof switch
-
Roll bar warning light illuminated
-
Top operates intermittently
-
Hydraulic pump not activating
If these symptoms are present and fuses, relays, and switch have been verified, this module may be faulty.
🏆 Why Buy From Oz’s Garage?
✔ Original OEM Mercedes part
✔ Used — not aftermarket reproduction
✔ Tested before shipping
✔ Proper part number verification
✔ Classic European dismantling inventory
We specialize in rare and discontinued European parts for serious restorations.
Ships within 1 / 2 Business Days
