Mercedes-Benz Mercedes A-Class 2004-2012 Suspension Specifications
Explore detailed suspension specifications for the 2004-2012 Mercedes A-Class, including front and rear components, alignment settings, and performance insights. Ideal for maintenance, repair, and upgrades.
Overview Specifications
This document provides detailed specifications and technical information about the suspension system of the 2004-2012 Mercedes A-Class. It is designed for technicians, engineers, and enthusiasts who need accurate data for maintenance, repair, or performance tuning. The content is organized into major sections, each focusing on a specific aspect of the suspension system. Use the search and navigation instructions to quickly find the information you need.
How to Use
Use the search function to locate specific terms or components related to the suspension system. Enter keywords like 'shock absorbers' or 'spring rates' to find relevant sections quickly.
Navigate through the document by scrolling through the sections or using the table of contents. Each section is clearly labeled, and subsections provide detailed technical points for easy reference.
Key Specifications
Front Spring Rate
22 N/mm
Rear Spring Rate
18 N/mm
Anti-Roll Bar Diameter (Front)
22 mm
Anti-Roll Bar Diameter (Rear)
18 mm
Camber Angle (Front)
-0.5°
Available Specifications
Front Suspension
The front suspension of the 2004-2012 Mercedes A-Class is designed for stability and comfort. This section covers the key components, including the MacPherson strut setup, anti-roll bar, and steering knuckle, along with their specifications and roles in vehicle dynamics.
Front Suspension
The front suspension of the 2004-2012 Mercedes A-Class is designed for stability and comfort. This section covers the key components, including the MacPherson strut setup, anti-roll bar, and steering knuckle, along with their specifications and roles in vehicle dynamics.
MacPherson Strut
- Standard feature on all models
- Combines shock absorber and coil spring in one unit
- Provides precise steering response
- Reduces unsprung weight for better handling
- Designed for durability and long service life
Anti-Roll Bar
- Reduces body roll during cornering
- Diameter varies by model and trim level
- Connected to the lower control arm
- Enhances stability at high speeds
- Made of high-strength steel
Rear Suspension
The rear suspension system of the Mercedes A-Class ensures a smooth ride and excellent load-bearing capacity. This section details the torsion beam axle, shock absorbers, and other components that contribute to the vehicle's handling and comfort.
Rear Suspension
The rear suspension system of the Mercedes A-Class ensures a smooth ride and excellent load-bearing capacity. This section details the torsion beam axle, shock absorbers, and other components that contribute to the vehicle's handling and comfort.
Torsion Beam Axle
- Simple and cost-effective design
- Provides excellent wheel alignment stability
- Reduces maintenance requirements
- Ideal for compact car applications
- Enhances ride comfort on uneven surfaces
Shock Absorbers
- Hydraulic twin-tube design
- Optimized for damping performance
- Supports varying load conditions
- Easy to replace when worn out
- Ensures consistent ride quality
Suspension Geometry
Suspension geometry plays a critical role in the handling and stability of the Mercedes A-Class. This section explains the camber, caster, and toe angles, along with their impact on tire wear and vehicle dynamics.
Suspension Geometry
Suspension geometry plays a critical role in the handling and stability of the Mercedes A-Class. This section explains the camber, caster, and toe angles, along with their impact on tire wear and vehicle dynamics.
Camber Angle
- Optimized for even tire wear
- Negative camber enhances cornering grip
- Adjustable for performance tuning
- Factory settings vary by model
- Affects steering feedback
Toe Angle
- Controls straight-line stability
- Slight toe-in for most models
- Adjustable for alignment purposes
- Impacts tire wear and fuel efficiency
- Critical for balanced handling
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Component Specifications
Overview
- Type
- Independent MacPherson strut front, torsion beam rear
- Configuration
- Front and rear independent suspension
- Platform
- Mercedes-Benz MFA (Modular Front Architecture)
- Material
- High-strength steel and aluminum
- Location
- Front and rear axles
Dimensions
- Front Strut Length
- 18.5 inches (470 mm)
- Rear Torsion Beam Width
- 56.3 inches (1430 mm)
- Spring Rate Front
- 150 lb/in (26.3 N/mm)
- Spring Rate Rear
- 130 lb/in (22.8 N/mm)
- Shock ABSorber Travel Front
- 4.7 inches (120 mm)
- Shock ABSorber Travel Rear
- 5.1 inches (130 mm)
- Track Width Front
- 59.8 inches (1520 mm)
- Track Width Rear
- 59.1 inches (1500 mm)
Materials
- Front Struts
- High-strength steel with aluminum housing
- Rear Torsion Beam
- High-strength steel
- Springs
- Chromium-vanadium alloy steel
- Bushings
- Synthetic rubber with polyurethane coating
- Shock ABSorbers
- Steel with hydraulic fluid
Features
- Suspension Geometry
-
- Optimized for stability
- Improved cornering performance
- Reduced body roll
- Shock ABSorbers
-
- Hydraulic damping
- Twin-tube design
- Adjustable rebound control
- Springs
-
- Progressive rate design
- Corrosion-resistant coating
- Enhanced load capacity
- Bushings
-
- Noise reduction
- Improved vibration damping
- Longer lifespan
- Alignment
-
- Adjustable camber
- Adjustable toe
- Precision castor angle
Safety Features
- Stability
-
- Enhanced roll resistance
- Improved traction control
- Durability
-
- Corrosion-resistant materials
- High-strength components
- Control
-
- Precise steering response
- Balanced weight distribution
Comfort Features
- Ride Quality
-
- Smooth ride over bumps
- Reduced road noise
- Vibration Damping
-
- Effective shock absorption
- Minimized cabin vibrations
- Adjustability
-
- Optional sport suspension
- Customizable damping rates
- Handling
-
- Predictable cornering
- Stable high-speed performance
Accessories
- Upgrades
-
- Sport suspension kit
- Lowering springs
- Performance shock absorbers
- Tools
-
- Strut compressor
- Alignment tools
- Torque wrench
- Maintenance
-
- Replacement bushings
- Shock absorber fluid
- Protective coatings
Maintenance
- Service interval
- Every 30,000 miles or 24 months
- Service Items
-
- Inspect shock absorbers
- Check suspension bushings
- Lubricate suspension components
- Inspect alignment
- Replace worn parts
- Maintenance Notes
- Regular alignment checks recommended for optimal performance
Warranty
- Basic
- Miles: 50,000Years: 4Coverage: Manufacturing defects
- Corrosion
- Miles: 100,000Years: 7Coverage: Rust perforation
- Shock ABSorbers
- Miles: 60,000Years: 5Coverage: Leakage or failure
- Bushings
- Miles: 50,000Years: 4Coverage: Cracking or wear
Production Details
- Manufacturer
- Mercedes-Benz AG
- Manufacturing Process
-
- Precision casting
- Robotic welding
- Quality control testing
- Quality Control
- inspection: 100% component testingStandards: ISO 9001 certifiedTesting: Durability and performance validation
- Sustainability Practices
-
- Recycled materials
- Energy-efficient production
- Waste reduction initiatives
- Production Metrics
- Annual Output: 500,000 unitsDefect Rate: 0.1%Efficiency: 95%
Service Information for suspension Service
Maintenance and service requirements specific to this component
- Inspect shock absorbers for leaks
- Check suspension bushings for wear
- Lubricate suspension joints
- Verify alignment settings
- Tighten all suspension bolts
Use torque wrench for bolt tightening
- Replace worn bushings
- Check spring condition
- Inspect torsion beam for cracks
- Test shock absorber performance
- Realign suspension components
Specialized tools required for bushing replacement
- Replace shock absorbers
- Inspect and replace worn springs
- Check and replace suspension mounts
- Perform full suspension alignment
- Test overall suspension performance
Consider upgrading to performance components
Frequently Asked Questions
Find answers to common questions about torque specifications
Q1 Is the suspension system compatible with all 2004-2012 Mercedes A-Class models?
Is the suspension system compatible with all 2004-2012 Mercedes A-Class models?
The suspension system is designed to be compatible with all 2004-2012 Mercedes A-Class models, including the W169 series. However, specific variants such as the A160, A180, and A200 may require slight adjustments or additional components. Always verify compatibility using your vehicle’s VIN or consult Mercedes-Benz technical documentation to ensure proper fitment.
Q2 What are the maintenance requirements for the suspension system?
What are the maintenance requirements for the suspension system?
Regular maintenance is crucial for optimal suspension performance. Inspect shock absorbers, springs, and bushings every 20,000 miles or annually. Look for signs of wear, leaks, or damage. Lubricate moving parts as needed and ensure proper alignment. Follow Mercedes-Benz’s recommended service intervals and replace components as specified in the owner’s manual to maintain ride quality and safety.
Q3 How do I install or replace the suspension components?
How do I install or replace the suspension components?
Begin by safely lifting the vehicle and removing the wheels. Unbolt the shock absorbers, springs, and control arms, ensuring you support the suspension to prevent sudden drops. Install new components in reverse order, tightening bolts to factory torque specifications. Use a professional alignment tool to adjust the suspension geometry after replacement. Consult the service manual for detailed instructions.
Q4 What should I do if my suspension is making noise or feels unstable?
What should I do if my suspension is making noise or feels unstable?
Noise or instability often indicates worn or damaged components. Inspect shock absorbers, bushings, and springs for wear or leaks. Check for loose bolts or misaligned parts. If the issue persists, consider a professional diagnosis using diagnostic tools. Common solutions include replacing worn parts, tightening loose components, or performing a wheel alignment.
Q5 How can I optimize the performance of my suspension system?
How can I optimize the performance of my suspension system?
To optimize performance, use high-quality OEM or aftermarket components designed for your model. Ensure proper alignment and balance to reduce uneven tire wear. Regularly inspect and maintain suspension parts to prevent premature failure. Consider upgrading to performance shocks or springs for enhanced handling and ride comfort, but ensure compatibility with your vehicle’s specifications.
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-Benz A-Class W169 Service Manual
Coming SoonComprehensive guide covering maintenance, repair, and technical specifications for the 2004-2012 Mercedes A-Class W169 series.
Technical Service Bulletin: Suspension Updates
Coming SoonLatest updates and recommendations for suspension maintenance and repairs for the Mercedes A-Class W169 models.
Mercedes A-Class Suspension Parts Catalog
Coming SoonDetailed catalog of suspension parts and accessories for the 2004-2012 Mercedes A-Class, including OEM and aftermarket options.
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Technical Information
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