Mercedes-Benz Mercedes C-Class 2014-2021 Electrical Specifications
Explore the detailed electrical system specifications for the 2014-2021 Mercedes C-Class. This guide covers battery, alternator, starter motor, wiring harnesses, and fuses, providing essential information for diagnostics, repairs, and upgrades. Ideal for technicians and owners seeking precise technical details.
Overview Specifications
This document provides a detailed overview of the electrical specifications for the Mercedes-Benz C-Class models produced between 2014 and 2021. It is designed to help users understand the key electrical components, systems, and features of these vehicles. Whether you are a technician, enthusiast, or owner, this guide will assist you in navigating the electrical details efficiently. Use the search and navigation instructions to find specific information quickly.
How to Use
Use the search functionality to locate specific keywords or terms within the document. Enter your query in the search bar and review the highlighted results for quick access to relevant sections.
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Key Specifications
Battery Voltage
12 V
Alternator Output
150-180 A
Headlight Type
LED
Infotainment Display
7-inch
Bluetooth Compatibility
Yes
Available Specifications
Battery and Charging System
This section covers the battery and charging system specifications for the Mercedes-Benz C-Class. It includes details on battery capacity, charging technology, and maintenance requirements.
Battery and Charging System
This section covers the battery and charging system specifications for the Mercedes-Benz C-Class. It includes details on battery capacity, charging technology, and maintenance requirements.
Battery Specifications
- 12-volt AGM battery
- Capacity: 70-80 Ah
- Cold cranking amps: 600-700 A
- Maintenance-free design
Charging System
- Alternator output: 150-180 A
- Smart charging technology
- Voltage regulator included
- Compatible with start-stop systems
Lighting System
This section provides information on the lighting systems used in the Mercedes-Benz C-Class, including headlights, taillights, and interior lighting.
Lighting System
This section provides information on the lighting systems used in the Mercedes-Benz C-Class, including headlights, taillights, and interior lighting.
Exterior Lighting
- LED headlights and taillights
- Adaptive Highbeam Assist
- Daytime Running Lights (DRL)
- Automatic headlight control
Interior Lighting
- Ambient lighting with multiple colors
- LED reading lights
- Automatic dimming rearview mirror
- Illuminated vanity mirrors
Infotainment and Connectivity
This section details the infotainment and connectivity features of the Mercedes-Benz C-Class, including audio systems, navigation, and smartphone integration.
Infotainment and Connectivity
This section details the infotainment and connectivity features of the Mercedes-Benz C-Class, including audio systems, navigation, and smartphone integration.
Audio System
- Standard 7-inch display
- Burmester surround sound system (optional)
- Bluetooth audio streaming
- USB and AUX inputs
Navigation and Connectivity
- COMAND Online system
- Apple CarPlay and Android Auto compatibility
- Voice control functionality
- Integrated Wi-Fi hotspot
Electrical Safety Systems
This section outlines the electrical safety systems in the Mercedes-Benz C-Class, including driver assistance features and electronic stability control.
Electrical Safety Systems
This section outlines the electrical safety systems in the Mercedes-Benz C-Class, including driver assistance features and electronic stability control.
Driver Assistance
- Active Brake Assist
- Blind Spot Assist
- Lane Keeping Assist
- Parking Assist with sensors
Stability and Control
- Electronic Stability Program (ESP)
- Anti-lock Braking System (ABS)
- Traction Control System (TCS)
- Adaptive braking technology
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Component Specifications
Overview
- Type
- 12V Electrical System
- Configuration
- Single Battery with Alternator
- Platform
- MRA (Modular Rear Architecture)
- Material
- Copper Wiring, Aluminum Components
- Location
- Front Engine Compartment and Rear Trunk
Dimensions
- Battery Length
- 12.5 in (31.75 cm)
- Battery Width
- 6.8 in (17.27 cm)
- Battery Height
- 7.5 in (19.05 cm)
- Alternator Diameter
- 5.9 in (15 cm)
- Wiring Length Total
- 328 ft (100 m)
- Fuse Box Dimensions
- 8.3 x 5.9 x 2.4 in (21 x 15 x 6 cm)
- Ground Strap Length
- 18 in (45.72 cm)
Materials
- Wiring
- Copper with PVC Insulation
- Battery Case
- Polypropylene
- Alternator Housing
- Aluminum Alloy
- Fuse Box
- Thermoplastic
- Connectors
- Nickel-Plated Brass
Features
- Lighting
-
- LED Headlights with Adaptive Highbeam Assist
- Ambient Lighting with 64 Colors
- Automatic Headlight Control
- Dynamic Turn Signals
- infotainment
-
- COMAND System with Touchpad
- Burmester Surround Sound System
- Wireless Charging Pad
- Apple CarPlay and Android Auto Integration
- Safety
-
- Active Brake Assist
- Blind Spot Monitoring
- Lane Keeping Assist
- Pre-Safe Sound System
- Comfort
-
- Dual-Zone Automatic Climate Control
- Heated and Ventilated Seats
- Power-Adjustable Steering Column
- Keyless-Go Entry System
- Drivetrain
-
- Start-Stop System
- Hybrid Electric Drive (Optional)
- Electric Power Steering
- Regenerative Braking
Safety Features
- Circuit Protection
-
- Smart Fuse Technology
- Overload Protection
- Short-Circuit Detection
- Battery Safety
-
- Automatic Disconnect in Crash
- Battery Management System
- Thermal Runaway Prevention
- Emergency Features
-
- Emergency Call System
- Automatic Hazard Lights Activation
- Battery Backup for Critical Systems
Comfort Features
- Climate Control
-
- Air Balance System with Ionization
- Rear Seat Climate Controls
- Heated Windshield Washer System
- Seating
-
- Memory Function for Driver Seat
- Massage Function for Front Seats
- Heated Rear Seats
- Lighting
-
- Reading Lights in Rear
- Puddle Lights with Mercedes Logo
- Footwell Lighting
- Convenience
-
- Power Trunk Lid
- Remote Start via App
- Hands-Free Access
Accessories
- Charging
-
- USB-C Ports (Front and Rear)
- Wireless Charging Pad
- 12V Power Outlet in Trunk
- Entertainment
-
- Rear Seat Entertainment System
- Head-Up Display
- Digital Instrument Cluster
- Utility
-
- Portable Jump Starter
- Tire Pressure Monitoring System
- Emergency Roadside Kit
Maintenance
- Service interval
- 10,000 miles or 12 months
- Service Items
-
- Battery Health Check
- Alternator Output Test
- Fuse Inspection
- Ground Connection Check
- Wiring Harness Inspection
- Maintenance Notes
- Use only Mercedes-approved replacement parts for electrical components.
Warranty
- Basic
- Years: 4Miles: 50000Coverage: Battery and Electrical Components
- Hybrid
- Years: 6Miles: 70000Coverage: Hybrid Battery and Drive System
- Corrosion
- Years: 5Miles: UnlimitedCoverage: Electrical Connectors and Wiring
- Extended
- Years: 7Miles: 100000Coverage: Optional Extended Electrical Warranty
Production Details
- Manufacturer
- Mercedes-Benz AG
- Manufacturing Process
-
- Automated Wiring Harness Assembly
- Precision Battery Testing
- Robotic Component Installation
- Quality Control
- Testing: High-Voltage Leakage Test, Continuity Check for Wiring, Load Testing for AlternatorStandards: ISO 9001 Certification, ISO 26262 for Functional Safety, RoHS Compliance
- Sustainability
-
- Recyclable Battery Components
- Lead-Free Wiring
- Energy-Efficient Manufacturing
- Production Metrics
- Units Per Year: 250000Defect Rate: 0.01%Energy Usage: 15 kWh per Vehicle
Service Information for Electrical Service
Maintenance and service requirements specific to the electrical system
- Inspect battery terminals for corrosion
- Test alternator output voltage
- Check all exterior lighting functionality
- Inspect wiring harness for wear or damage
- Verify ground connections
Use diagnostic tools compatible with Mercedes-Benz systems.
- Perform battery load test
- Inspect and clean alternator connections
- Check fuse box for proper operation
- Test all interior lighting and switches
- Verify operation of safety systems
Replace any fuses showing signs of wear or discoloration.
- Replace battery if necessary
- Inspect and test all wiring harnesses
- Check and replace alternator if required
- Test all electronic control modules
- Perform full system diagnostic scan
Ensure all software updates are applied during this service.
Frequently Asked Questions
Find answers to common questions about torque specifications
Q1 Are the electrical components of the 2014-2021 Mercedes C-Class compatible with other models?
Are the electrical components of the 2014-2021 Mercedes C-Class compatible with other models?
The electrical components of the 2014-2021 Mercedes C-Class are specifically designed for this model and may not be directly compatible with other Mercedes-Benz models. Compatibility depends on the specific part and the vehicle’s electrical architecture. For example, the control units, wiring harnesses, and sensors are often model-specific. Always consult the vehicle’s technical documentation or a certified Mercedes-Benz technician to ensure compatibility.
Q2 What maintenance is required for the electrical system of the 2014-2021 Mercedes C-Class?
What maintenance is required for the electrical system of the 2014-2021 Mercedes C-Class?
The electrical system of the 2014-2021 Mercedes C-Class requires regular inspections to ensure optimal performance. Key maintenance tasks include checking the battery health, inspecting wiring harnesses for wear or damage, and ensuring all fuses and relays are functioning correctly. Software updates for control units should also be performed as recommended by Mercedes-Benz. Additionally, the alternator and starter motor should be inspected periodically to prevent electrical failures.
Q3 How do I replace the battery in a 2014-2021 Mercedes C-Class?
How do I replace the battery in a 2014-2021 Mercedes C-Class?
To replace the battery in a 2014-2021 Mercedes C-Class, first, ensure the vehicle is off and the key is removed. Locate the battery in the trunk or under the hood, depending on the model. Disconnect the negative terminal first, followed by the positive terminal. Remove the battery hold-down clamp and carefully lift the battery out. Install the new battery, secure it with the clamp, and reconnect the positive terminal first, then the negative terminal. Finally, register the new battery using a Mercedes-Benz diagnostic tool to ensure proper system integration.
Q4 What should I do if the electrical system in my 2014-2021 Mercedes C-Class malfunctions?
What should I do if the electrical system in my 2014-2021 Mercedes C-Class malfunctions?
If the electrical system in your 2014-2021 Mercedes C-Class malfunctions, start by checking the battery voltage and connections. Inspect fuses and relays for any signs of damage. If the issue persists, use a diagnostic tool to read fault codes from the vehicle’s control units. Common issues include faulty sensors, alternator problems, or software glitches. For complex issues, consult a certified Mercedes-Benz technician to diagnose and repair the system accurately.
Q5 How can I optimize the electrical system performance in my 2014-2021 Mercedes C-Class?
How can I optimize the electrical system performance in my 2014-2021 Mercedes C-Class?
To optimize the electrical system performance in your 2014-2021 Mercedes C-Class, ensure the battery is in good condition and fully charged. Regularly update the vehicle’s software to the latest version provided by Mercedes-Benz. Minimize the use of aftermarket electrical accessories that may strain the system. Additionally, inspect and clean electrical connections to prevent corrosion. Using high-quality replacement parts and adhering to the maintenance schedule will also help maintain optimal performance.
Factory Service Resources
Access official service manuals, technical documents, and repair guides. These resources provide detailed procedures, specifications, and diagrams directly from the manufacturer.
Mercedes C-Class Electrical System Service Manual
Coming SoonThis manual provides detailed instructions for diagnosing, maintaining, and repairing the electrical system of the 2014-2021 Mercedes C-Class.
Technical Service Bulletin: Electrical System Updates
Coming SoonThis bulletin outlines important updates and fixes for the electrical system of the 2014-2021 Mercedes C-Class, including software patches and hardware improvements.
Mercedes C-Class Electrical Parts Catalog
Coming SoonThis catalog lists all electrical components available for the 2014-2021 Mercedes C-Class, including part numbers and compatibility details.
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Technical Information
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