Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
Roof Operation
The illustration shows which control modules are involved when operating the retractable roof.
Roof operation is activated via the switches on the control panel in the passenger compartment. The switches (3/25) are directly connected to the Convertible Roof Module (CRM) (4/59). The Convertible Roof Module (CRM) then transmits a signal on the CAN network to the Driver door module (DDM) (3/126) and the Passenger door module (PDM) (3/127). These, in turn, transmit another signal via their LIN network to the Left rear door module (LDM) (3/128) and the Right rear door module (RDM) (3/129).
All side windows lower at least 80 mm, to prevent friction between the roof and the windows when the roof is retracted and operated up. Thereafter the hydraulic pump and roof operation starts.
The roof is operated using an electrical and hydraulic system with the following components.
- Hydraulic cylinders
- Position sensors, used to determine the position of the hydraulic cylinders.
- Hall sensors, used to determine the position of the various metal components of the roof.
- Hydraulic pump
- Hydraulic valves, used to control the various hydraulic cylinders.
- Mechanical catches, used to lock parts of the roof in different positions.
- Electric catch motor, is an electro mechanical unit that is used to transfer mechanical force via a spring to the various catches.
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When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- • You smell fuel, burning insulation, or see smoke.
- • Brakes feel soft, pull hard to one side, or make grinding noises.
- • The engine overheats, stalls repeatedly, or misfires under load.
- • You are missing required tools, torque specs, or safe lifting equipment.
- • You are not confident in the next step or safety outcome.