Provides comprehensive, dealer-level repair and maintenance information, crucial for DIY mechanics and independent workshops to service this complex luxury vehicle.
Diagnostic trouble codes (DTCs), symptom-based troubleshooting guides, common fault analysis
Repair Procedures:
Step-by-step instructions for component replacement, adjustments, and overhauls
Diagnostic Procedures:
Using scan tools, electrical testing, mechanical component testing
Adjustment Procedures:
Wheel alignment, throttle linkage, parking brake
Wiring Diagrams:
Comprehensive electrical circuit diagrams for all vehicle systems
Technical Depth
Depth:
Complete factory-level diagnostic and repair information
Detail Level:
Detailed specifications, torque values, clearances, and procedures for professional technicians
Rebuild Information:
Includes procedures for rebuilding major components like engines and transmissions
📊 Manual Specifications
File Format
Type:
PDF
Searchability:
Text-searchable for quick information retrieval
Printability:
Printable pages for workshop use
Print Quality
Quality:
High-resolution scans ensuring clarity of diagrams and text
Binding Type
Type:
N/A (Digital Download)
Paper Type
Type:
N/A (Digital Download)
⚙️ Engine Specifications
Primary Engine
Engine Type:
V6, SOHC, 18-valve (M112 E32)
Displacement:
3.2 Liters (3199 cc)
Bore X Stroke:
89.9 mm x 84.0 mm
Compression Ratio:
10.0:1
Performance
Horsepower:
215 hp @ 5750 rpm
Torque:
229 lb-ft (310 Nm) @ 3000-4500 rpm
Fuel System
Injection Type:
Sequential Electronic Fuel Injection (SEFI)
Fuel Type:
Premium Unleaded Gasoline (91 Octane Recommended)
Engine Codes Relevant
Engine Family:
M112
Engine Features
Engine Orientation:
V-configuration, longitudinal
Valvetrain:
Single Overhead Camshaft (SOHC) per cylinder bank, 3 valves per cylinder
Emissions Control:
Catalytic converter, Secondary Air Injection (SAI) system (on some models/years)
🔧 Transmission
Standard
Type:
5-Speed Automatic (722.6 - NAG1)
Optional
Type:
N/A for ML320 in this generation
Features
Drive Modes:
Comfort (C) and Sport (S) modes
Torque Converter Lockup:
Yes, provides direct drive efficiency
Fluid Specifications
Fluid Type:
MB Spec 236.10 (ATF 3353, successor to ATF 3403)
Fluid Capacity
Capacity Approx:
8-10 Liters (depending on service type)
📐 Dimensions
Exterior
Length:
4638 mm (182.6 in)
Width:
1842 mm (72.5 in)
Height:
1757 mm (69.2 in)
Wheelbase:
2820 mm (111.0 in)
Ground Clearance:
Approximately 200 mm (7.9 in) (varies with suspension option)
Weights
Curb Weight:
Approx. 1950-2100 kg (4300-4630 lbs)
Gross Vehicle Weight Rating:
Approx. 2700 kg (5950 lbs)
Towing Capacity:
Up to 2600 kg (5730 lbs) with factory tow hitch
🛡️ Safety Features
Ratings
NHTSA Front Impact:
4-Star (Driver and Passenger) for 1998 model
IIHS Side Impact:
Good (for models equipped with side airbags)
Active Features
Traction Control:
ASR (Anti-Slip Regulation)
Stability Control:
ESP (Electronic Stability Program)
ABS:
Standard Anti-lock Braking System
Passive Features
Airbags:
Front airbags, optional front side-impact airbags, optional curtain airbags (later models)
Seatbelts:
3-point inertia-reel seatbelts with pre-tensioners and load limiters
💡 Technology Features
Infotainment
Audio System:
Factory AM/FM/CD player with optional CD changer, premium sound system options available (e.g., Bose).
Navigation:
Optional COMAND (Cockpit Management and Navigation) system with color display.
Driver Assistance
Cruise Control:
Standard electronic cruise control
Parking Assistance:
Optional parking sensors (Parktronic) on later models
Connectivity
Phone Integration:
Optional Mercedes-Benz TeleAid system (emergency calling) and integrated hands-free phone systems (various generations/options).
🔧 Maintenance
Service Intervals
Oil Change Interval:
Every 10,000 miles or 12 months, whichever comes first (using synthetic oil)
Transmission Service Interval:
Every 60,000 miles (fluid and filter replacement recommended)
Air Filter Replacement:
Every 30,000 miles or as needed based on driving conditions
Spark Plug Replacement:
Every 100,000 miles (if original platinum/iridium plugs are used)
Fluid Specifications
Engine Oil Type:
SAE 0W-40 or 5W-40 Full Synthetic, MB Approval 229.5 or 229.51
Engine Oil Capacity:
8.0 Liters (8.5 US Quarts)
Coolant Type:
MB Spec 325.0 (Glysantin G05 or equivalent, typically a pink/red long-life coolant)
Brake Fluid Type:
DOT 4 Plus (or DOT 4)
Power Steering Fluid Type:
MB Spec 236.3 (ATF Dexron II or equivalent)
Known Issues
Common Problems:
Mass airflow sensor (MAF) issues, EGR valve clogging (if equipped), oil cooler seals leaking, transmission conductor plate failure, rust on tailgate and wheel arches, HVAC blower motor resistor failure, ABS/ESP sensor issues, fuel pump failure.
Preventative Maintenance Focus:
Regularly check and replace PCV system components and vacuum hoses to prevent vacuum leaks and potential engine performance issues. Monitor transmission fluid and condition during services.
📚 Vehicle History
Brand Heritage
Manufacturer:
Mercedes-Benz AG
Established Year:
1886
Model Evolution
Introduction Year:
1997
Development Basis:
Developed to compete in the growing SUV market, combining Mercedes-Benz luxury and engineering with off-road capability.
Facelift:
Minor refresh for the 2002 model year, including updated interior materials, revised exterior styling (grille, headlights, taillights), and engine enhancements.
Production
Manufacturing Location:
Tuscaloosa, Alabama, USA
Production Period:
1997-2005
🏆 Awards & Recognition
Recognitions
Award Example:
Named MotorTrend's SUV of the Year for 1998.
Ratings
Consumer Reports Reliability:
Variable, generally average to below average for this model year range, highlighting the importance of thorough maintenance and using this manual for accurate repairs.
Certifications
Certification Type:
N/A for the manual itself, but the vehicle adheres to Mercedes-Benz's rigorous internal quality standards.