Mercedes-Benz Mercedes A-Class 1997-2004 Brakes Specifications
Discover detailed brake specifications for the 1997-2004 Mercedes A-Class (W168), including rotor dimensions, pad materials, caliper design, and maintenance tips. Ideal for repairs, upgrades, and ensuring optimal braking performance.
Overview Specifications
This document provides detailed specifications and technical information about the braking system of the 1997-2004 Mercedes A-Class. It is designed to assist owners, mechanics, and enthusiasts in understanding the components, functionality, and maintenance of the brakes. Use the search and navigation instructions to quickly find relevant information. The sections are organized to cover major aspects of the braking system, including components, performance, and maintenance tips.
How to Use
Use the search functionality to locate specific terms or components within the document. Enter keywords such as 'brake pads' or 'ABS system' to find relevant sections quickly.
Navigate through the document using the table of contents or by scrolling through the sections. Each major section is labeled clearly, and subsections provide detailed information on specific topics.
Key Specifications
Front Brake Disc Diameter
280mm
Rear Brake Disc Diameter
258mm
Brake Fluid Type
DOT 4
ABS System
Standard
Stopping Distance (100-0 km/h)
38m
Available Specifications
Brake System Components
This section covers the key components of the Mercedes A-Class braking system, including the brake discs, pads, calipers, and hydraulic system. Understanding these components is essential for maintenance and troubleshooting.
Brake System Components
This section covers the key components of the Mercedes A-Class braking system, including the brake discs, pads, calipers, and hydraulic system. Understanding these components is essential for maintenance and troubleshooting.
Brake Discs
- Ventilated front discs for improved heat dissipation
- Solid rear discs for consistent performance
- Diameter: 280mm (front), 258mm (rear)
- Material: High-carbon cast iron
Brake Pads
- Semi-metallic compound for durability
- Low-noise design for comfort
- Wear sensor included for maintenance alerts
- Compatible with ABS system
Brake Performance
This section focuses on the performance characteristics of the braking system, including stopping distance, ABS functionality, and pedal feel. It also highlights safety features and driving dynamics.
Brake Performance
This section focuses on the performance characteristics of the braking system, including stopping distance, ABS functionality, and pedal feel. It also highlights safety features and driving dynamics.
ABS System
- Standard ABS for enhanced safety
- Four-channel system for individual wheel control
- Integrated with Electronic Brake Force Distribution (EBD)
- Reduces skidding during hard braking
Stopping Distance
- 100 km/h to 0 in approximately 38 meters
- Consistent performance in wet and dry conditions
- Optimized for urban and highway driving
Maintenance and Care
This section provides practical tips for maintaining the braking system, including inspection intervals, pad replacement, and fluid checks. Proper maintenance ensures longevity and safety.
Maintenance and Care
This section provides practical tips for maintaining the braking system, including inspection intervals, pad replacement, and fluid checks. Proper maintenance ensures longevity and safety.
Brake Fluid
- Use DOT 4 brake fluid for optimal performance
- Replace every 2 years or 30,000 miles
- Check fluid level monthly
- Bleed system during fluid replacement
Brake Pad Replacement
- Inspect pads every 10,000 miles
- Replace pads when thickness is below 3mm
- Use OEM or high-quality aftermarket pads
- Check calipers and discs during replacement
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Brakes Specifications
Overview
- Type
- Disc brakes (front), Drum brakes (rear)
- Configuration
- Hydraulic dual-circuit with diagonal split
- Platform
- Mercedes-Benz W168
- Material
- Cast iron discs, Aluminum alloy calipers
- Location
- Front and rear axles
Dimensions
- Front Disc Diameter
- 280 mm / 11.02 in
- Rear Drum Diameter
- 200 mm / 7.87 in
- Front Pad Thickness
- 12 mm / 0.47 in
- Rear Shoe Thickness
- 5 mm / 0.2 in
- Caliper Piston Diameter
- 48 mm / 1.89 in
- Master Cylinder Bore
- 22.2 mm / 0.87 in
- Brake Line Diameter
- 4.75 mm / 0.187 in
Materials
- Discs
- High-carbon cast iron
- Calipers
- Aluminum alloy
- Pads
- Semi-metallic friction material
- Drums
- Gray cast iron
- Shoes
- Organic friction material
Features
- Braking System
-
- ABS (Anti-lock Braking System)
- BAS (Brake Assist System)
- Electronic Brake Force Distribution (EBD)
- Caliper Design
-
- Single-piston floating caliper
- Integrated dust seals
- Corrosion-resistant coating
- Disc Features
-
- Vented design for heat dissipation
- Slotted surface for improved braking
- Hardened for durability
- Drum Features
-
- Self-adjusting mechanism
- Heat-resistant lining
- Integrated parking brake
- Pedal System
-
- Hydraulic brake booster
- Adjustable pedal feel
- Integrated brake light switch
Safety Features
- Active Safety
-
- ABS prevents wheel lockup
- BAS increases braking force in emergencies
- EBD optimizes brake force distribution
- Passive Safety
-
- Dual-circuit system for redundancy
- Automatic brake pad wear indicator
- Overheat protection design
Comfort Features
- Noise Reduction
-
- Anti-squeal shims on pads
- Resonance dampers in calipers
- Smooth drum surface for quiet operation
- Pedal Feel
-
- Progressive brake force application
- Minimal pedal travel
- Consistent feedback
- Maintenance Ease
-
- Quick-change pad design
- Accessible drum inspection ports
- Self-adjusting rear brakes
Accessories
- Upgrade Options
-
- Performance brake pads
- Drilled and slotted discs
- Stainless steel brake lines
- Maintenance Tools
-
- Brake pad spreader
- Drum brake spring tool
- Caliper piston compressor
- Replacement Parts
-
- OEM brake pads
- Replacement drums
- Brake fluid reservoir
Maintenance
- Service interval
- Every 12,000 miles or 12 months
- Service Items
-
- Inspect brake pad thickness
- Check brake fluid level
- Test brake system for leaks
- Inspect disc and drum surfaces
- Verify ABS functionality
- Maintenance Notes
- Use only DOT 4 brake fluid. Avoid mixing different types of brake fluid.
Warranty
- Brake Pads
- Miles: 24,000Years: 2Coverage: Replacement if worn prematurely
- Brake Discs
- Miles: 36,000Years: 3Coverage: Replacement if warped or cracked
- Calipers
- Miles: 60,000Years: 5Coverage: Replacement if leaking or seized
- Master Cylinder
- Miles: 60,000Years: 5Coverage: Replacement if faulty
Production Details
- Manufacturer
- Mercedes-Benz AG
- Manufacturing Process
-
- Precision casting of discs and drums
- CNC machining of calipers
- Automated assembly of brake components
- Quality Control
- Dimensional Tolerance: ±0.01 mmMaterial Testing: Hardness and tensile strength checksPerformance Testing: High-speed braking simulation
- Sustainability Practices
-
- Recycled materials in friction components
- Water-based coatings for corrosion protection
- Energy-efficient manufacturing processes
- Production Metrics
- Annual Output: 500,000 brake systemsDefect Rate: <0.1%Lead Time: 2 weeks
Service Information for brakes Service
Maintenance and service requirements specific to this component
- Inspect brake pad and shoe thickness
- Check brake fluid level and condition
- Inspect brake lines for damage or leaks
- Test parking brake functionality
- Verify ABS system operation
Ensure proper brake fluid type is used. Avoid contamination.
- Measure disc and drum thickness
- Check caliper and wheel cylinder operation
- Inspect brake hardware for wear
- Test brake pedal feel and response
- Perform brake system bleed if necessary
Use proper tools for caliper service. Avoid damaging brake lines.
- Replace brake pads and shoes
- Resurface or replace discs and drums if needed
- Replace brake fluid completely
- Inspect and replace brake hoses if necessary
- Perform full brake system diagnostic
Follow torque specifications for all components. Use genuine parts.
Frequently Asked Questions
Find answers to common questions about torque specifications
Q1 Are these brakes compatible with all 1997-2004 Mercedes A-Class models?
Are these brakes compatible with all 1997-2004 Mercedes A-Class models?
The brakes are designed to be compatible with all 1997-2004 Mercedes A-Class models, including the A140, A160, and A190 variants. They meet the original equipment specifications for rotor size, pad material, and caliper fitment. However, it is recommended to verify compatibility with your specific model and trim level, as minor variations may exist. Always cross-reference the part number with your vehicle’s manual or consult a dealer for confirmation.
Q2 What is the maintenance schedule for the brakes on a 1997-2004 Mercedes A-Class?
What is the maintenance schedule for the brakes on a 1997-2004 Mercedes A-Class?
The brakes on a 1997-2004 Mercedes A-Class should be inspected every 10,000 miles or annually, whichever comes first. Brake pads typically last between 30,000 to 50,000 miles, while rotors may need replacement every 50,000 to 70,000 miles, depending on driving conditions. Regularly check for signs of wear, such as squeaking, reduced braking performance, or uneven pad wear. Fluid levels should also be checked and replaced every 2 years or as specified in the owner’s manual.
Q3 How do I replace the brake pads on a 1997-2004 Mercedes A-Class?
How do I replace the brake pads on a 1997-2004 Mercedes A-Class?
To replace the brake pads on a 1997-2004 Mercedes A-Class, start by safely lifting the vehicle and removing the wheels. Locate the brake caliper and remove the retaining bolts using a socket wrench. Slide the caliper off the rotor and remove the old brake pads. Compress the caliper piston using a C-clamp or similar tool. Install the new pads, reassemble the caliper, and secure it with the bolts. Reinstall the wheels and lower the vehicle. Test the brakes before driving to ensure proper installation.
Q4 What should I do if my brakes are squeaking or vibrating?
What should I do if my brakes are squeaking or vibrating?
If your brakes are squeaking or vibrating, it could indicate worn brake pads, uneven rotor surfaces, or debris in the braking system. Start by inspecting the brake pads for wear and replace them if necessary. Check the rotors for warping or scoring, and resurface or replace them as needed. Clean the brake components to remove any debris or dust. If the issue persists, inspect the calipers and brake lines for potential problems and consult a professional mechanic.
Q5 How can I optimize the performance of my brakes?
How can I optimize the performance of my brakes?
To optimize brake performance, use high-quality brake pads and rotors that meet or exceed OEM specifications. Ensure proper installation and bedding-in of new pads by following the manufacturer’s guidelines. Regularly inspect and maintain the braking system, including fluid levels and caliper function. Avoid aggressive driving habits that can cause excessive wear. Upgrading to performance brake components, such as slotted rotors or ceramic pads, can also enhance stopping power and reduce fade under heavy use.
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 A-Class Brake System Service Manual
Coming SoonDetailed guide covering brake system maintenance, repair, and replacement procedures for 1997-2004 Mercedes A-Class models.
Technical Service Bulletin: Brake Pad Wear Issues
Coming SoonOfficial bulletin addressing common brake pad wear issues and recommended solutions for 1997-2004 Mercedes A-Class vehicles.
Mercedes A-Class Brake Parts Catalog
Coming SoonComprehensive catalog listing genuine and compatible brake parts for 1997-2004 Mercedes A-Class models.
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Technical Information
- All specifications, including torque values, fluid capacities, and maintenance procedures, should be verified against your vehicle's factory service manual.
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