Combination Switch MB571633 is a critical driver control interface integrated into the automotive steering column. It centralizes the operation of multiple vehicle functions, including lighting (headlights, turn signals, wipers) and cruise control, into a single, ergonomic module. Designed for precise fit and reliable performance, it ensures seamless control and enhances driving safety and convenience.
Key Features
Precise OEM Fit
Manufactured to strict original equipment specifications, part number MB571633 is a direct plug-and-play replacement, guaranteeing perfect compatibility and alignment with the steering column housing without the need for modifications.
01
Durable Construction
Utilizes high-strength engineering plastics for the housing and levers, providing excellent resistance to wear, UV exposure, and temperature fluctuations. Metal contacts are gold-plated for optimal conductivity and corrosion resistance.
02
Stable Signal Transmission
Features a multi-layer circuit board with 15-pin connectors, sealed to prevent moisture ingress, ensuring stable signal transmission and preventing intermittent failures or short circuits.
03
Ergonomic Design
The stalk levers are designed for intuitive operation and tactile feedback, allowing drivers to activate functions without diverting attention from the road.
04
Rigorous Quality Assurance
Produced under IATF 16949 automotive quality standards. Each unit undergoes comprehensive testing for electrical function, mechanical actuation, and environmental resilience to ensure 100% performance reliability.
05
Technical Specifications
|
Item |
Specification |
|
Product OEM Number |
MB571633 |
|
Product Type |
15-pin Steering Column Combination Switch |
|
Primary Functions |
Headlight Control (Low/High Beam, Front Fog), Turn Signals, Hazard Lights, Front/Rear Wiper & Washer Control, Cruise Control (Set/Resume/Cancel/Speed Adjustment) |
|
Operating Voltage |
12V DC |
|
Operating Temperature Range |
-30°C to +85°C |
|
Connector Type |
15-pin sealed electrical connectors |
|
Housing Material |
High-impact, UV-resistant ABS/PC blend plastic |
Structural Composition & Diagram
Main Control Stalks
Two primary stalks (typically left for lights/turn signals, right for wipers/cruise) with multi-directional movement and integrated buttons.
01
Switch Housing
Encases the internal circuitry and provides a secure mounting interface to the steering column.
02
15-pin Electrical Connectors
Robust, sealed 15-pin male and female connectors that interface directly with the vehicle's main wiring harness, ensuring a reliable connection.
03
Internal Circuit Board
Contains the contact arrays, micro-switches, and integrated circuitry that translate lever and button movements into precise electrical signals.
04
Mounting Bracket & Hardware
Includes precision clips, alignment pins, and fastening points for a secure, rattle-free installation.
05
Compatible Vehicle Applications
- Mercedes-Benz: C-Class (W204) (2007-2014), E-Class (W212) (2009-2016)
- Smart: Fortwo (Model 451) (2007-2015)
Installation & Usage Notes
Safety First
Before starting, disconnect the vehicle's negative battery terminal and wait at least 3 minutes to deplete any residual power in the system's capacitors (especially for airbag-related circuits, if applicable).
Removal
Carefully remove the steering column shrouds/trim pieces to access the switch assembly. Note the routing of any wiring. Depress the locking tabs to disconnect the 15-pin electrical connectors.
Installation
Align the new combination switch (MB571633) precisely into its mounting position on the steering column. Ensure all mounting screws or clips are fully secured. Firmly reconnect the 15-pin electrical connectors until a distinct click is heard.
Testing
Reconnect the battery. Before reassembling all trim, test all functions thoroughly: headlights (low/high beam, front fog), turn signals, hazard lights, wipers (multiple speeds, intermittent, automatic rain sensor if equipped), washers, and cruise control. Ensure no warning lights remain on the instrument cluster. Use a diagnostic scanner to clear any potential fault codes.
Packaging, Storage, Handling & Transportation
Combination Switch MB571633 is packaged in a sealed anti-static bag within a protective, form-fitting cardboard box. Store the product in its original packaging in a clean, dry, and temperate environment. Avoid exposure to direct sunlight, excessive humidity, or dust. Do not stack boxes too high to avoid crushing. During handling and transportation, avoid dropping, crushing, or subjecting the package to strong impacts. Handle the product with care; do not bend or apply force to the control stalks or the 15-pin connector pins.
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