🏷️ Basic Information

Make:

Mercedes-Benz

Model:

R-Class

Chassis Code:

W251

Year:

2007

👋 Introduction

Market Positioning:

The 2007 Mercedes-Benz R-Class (W251) was positioned as a luxury crossover vehicle, blending minivan practicality with SUV styling and luxury features. It aimed to attract families seeking a sophisticated and comfortable long-distance cruiser.

Key Features:

Spacious interior, available all-wheel drive, advanced safety systems, and Mercedes-Benz's hallmark luxury and engineering. Available in short and long wheelbase versions.

Value Proposition:

This service and repair manual provides the same in-depth, vehicle-specific information used by dealership technicians. It empowers owners to perform maintenance, diagnostics, and repairs with confidence, saving time and money compared to relying solely on external repair shops.

Target Audience:

Owners of the 2007 Mercedes-Benz R-Class (W251) seeking to perform maintenance, troubleshooting, or repairs themselves, or to better understand the vehicle's systems and potential issues when dealing with a mechanic.

📋 Manual Details

Coverage Areas:

All models and all repairs A-Z for the 2007 Mercedes-Benz R-Class (W251)

Format Type:

Digital (PDF)

Language:

English

Manual Type:

Factory Service and Repair Manual

📖 Manual Coverage

Systems Covered:

Maintenance, Engine, Control System, Mechanical, Fuel Service Specifications, Emission Control, Intake/Exhaust/Cooling, Lube, Ignition/Starting/Charging, Auto Transmission, Clutch, Manual Transmission, Transfer/Propeller Shaft, Drive Shaft, Differential, Axle/Suspension, Tire & Wheel, Brake Control, Brake, Parking Brake, Steering Column, Power Steering, Air Conditioning, Supplemental Restraint System (SRS), Seat Belt, Engine Immobilizer, Cruise Control, Wiper & Washer, Door Lock, Meter/Audio/Visual, Horn, Windshield/Glass/Mirror, Instrument Panel, Seat, Engine Hood/Door, Exterior & Interior, Electrical, Multiplex/CAN Communication, and more.

Procedures Included:

Step-by-step instructions, diagnostic procedures, repair procedures, maintenance schedules, troubleshooting guides, wiring schematics, illustrations, and specifications.

Technical Depth:

Vehicle-specific, factory-level detail for technicians and advanced DIY enthusiasts. Covers everything from routine maintenance to complex diagnostics and component overhauls.

Diagnostic Procedures:

Detailed diagnostic trouble codes (DTCs), symptom-based troubleshooting trees, and specific diagnostic flowcharts for various systems.

Wiring Schematics Coverage:

Comprehensive electrical wiring diagrams for all major systems, including engine control, body electronics, chassis, comfort, and infotainment.

Component Replacement Procedures:

Detailed step-by-step instructions for the removal, installation, and adjustment of all major vehicle components and systems.

Technical Specifications Included:

Torque specifications, clearances, fluid capacities, pressures, electrical values, and other critical data.

📊 Manual Specifications

File Format:

PDF

Printable:

Yes (all pages)

Compatibility:

Windows (Vista 32/64, XP, ME, 98, NT, 2000) and Mac

Usability Features:

Single, easy-to-use PDF; printable pages; zoomable images; no requirement for physical book handling.

Searchable Text:

Yes (typical for PDF manuals, allowing for keyword searching within the document).

Print Quality Aspects:

High-resolution illustrations and diagrams suitable for clear printing at enlarged sizes.

⚙️ Engine Specifications

Engine Options:

For the 2007 model year, the R-Class typically offered the following engines: R350 (3.5L V6 M272 engine), R500 (5.0L V8 M113 engine).

R350 Engine Details:

3.5L V6 (M272 E35), naturally aspirated, DOHC with VVT. Horsepower: Approx. 268 hp @ 6000 rpm. Torque: Approx. 258 lb-ft @ 2400-5000 rpm.

R500 Engine Details:

5.0L V8 (M113 E50), naturally aspirated, SOHC. Horsepower: Approx. 302 hp @ 5600 rpm. Torque: Approx. 339 lb-ft @ 2800-4000 rpm.

Fuel System Type:

Electronic Fuel Injection (EFI)

Cooling System Type:

Liquid-cooled, pressurized system with electric fans.

Engine Control Module:

ME-SFI [7] (Motronic) for V6 models, ME-SFI [7] (Motronic) for V8 models, managed by the ECU.

🔧 Transmission

Standard Transmission Type:

7G-TRONIC 7-speed automatic transmission

Optional Transmission Type:

Not applicable for 2007 model year; 7G-TRONIC was standard across R-Class variants.

Transmission Features:

Includes Comfort (C), Sport (S), and Manual (M) modes. Selectable on-the-fly.

AWD System Type:

4MATIC all-wheel drive (standard on most models)

📐 Dimensions

Wheelbase Short:

116.1 inches (2950 mm)

Wheelbase Long:

126.6 inches (3215 mm)

Length Short:

199.6 inches (5070 mm)

Length Long:

210.1 inches (5337 mm)

Curb Weight R350:

Approx. 4,707 lbs (2135 kg)

Curb Weight R500:

Approx. 4,938 lbs (2240 kg)

Seating Capacity:

Standard 6-passenger configuration (2+2+2), with optional 7-passenger configuration (2+3+2).

Cargo Volume Behind 3Rd Row:

Approx. 16.7 cu ft (short wheelbase), Approx. 22.7 cu ft (long wheelbase)

Cargo Volume Max:

Approx. 87.1 cu ft (short wheelbase), Approx. 92.7 cu ft (long wheelbase)

🛡️ Safety Features

NHTSA Front Impact:

5-star rating (for 2007 model year)

IIHS Side Impact:

Good rating (for 2007 model year)

Active Safety Features:

ABS (Anti-lock Braking System), ESP (Electronic Stability Program), Traction Control, 4MATIC AWD, Brake Assist.

Passive Safety Features:

Front airbags, side-impact airbags (front and rear), curtain airbags, active front head restraints, front seatbelt pretensioners.

💡 Technology Features

Infotainment System:

COMAND (Cockpit Management and Navigation) system, often including a central display, CD player, radio, and optional navigation and Bluetooth connectivity.

Driver Assistance Features:

Optional systems could include parking sensors (PARKTRONIC), adaptive cruise control (DISTRONIC), and a rearview camera.

Connectivity Options:

Bluetooth hands-free calling (UHI interface), auxiliary audio input.

Climate Control Type:

Dual-zone or tri-zone automatic climate control (THERMATIC or THERMOTRONIC).

Lighting System Coverage:

Headlights, taillights, interior lighting, fog lights, and bulb replacement procedures.

🔧 Maintenance

Engine Oil Change Interval:

Typically every 10,000 miles or 12 months, whichever comes first, using synthetic oil. Specific interval may vary based on driving conditions and Mercedes-Benz service recommendations at the time.

Engine Oil Spec:

SAE 0W-40 or 5W-40 Synthetic Oil meeting MB 229.5 specification.

Coolant Spec:

Mercedes-Benz approved Antifreeze/Coolant (e.g., G05) concentrate diluted with distilled water to a 50/50 mix.

Transmission Fluid Spec:

MB 236.14 (for 7G-TRONIC transmission)

Brake Fluid Spec:

DOT 4 Plus (MB 331.0)

Common Issues R Class 2007:

Potential issues can include oil leaks from the valve cover gaskets or oil cooler seals, issues with the balance shaft in the M272 engine (though less common in early models), faulty door lock actuators, and occasional air suspension problems (if equipped). The manual will cover diagnostic procedures for these.

Tire Rotation Interval:

Every 5,000 - 7,500 miles or as per owner's manual recommendation.

Cabin Air Filter Replacement:

Typically every 15,000 - 20,000 miles or annually. The manual will detail the replacement procedure.

Spark Plug Replacement Interval R350:

Typically around 100,000 miles for iridium-tipped spark plugs (refer to manual for exact part numbers and intervals).

Serpentine Belt Inspection Replacement:

Inspect at every oil change, replace as needed or based on mileage/condition. Manual will specify interval and part number.

Brake Pad Rotor Replacement:

Detailed procedures for front and rear brake pad and rotor replacement, including caliper service and brake fluid bleeding.

Suspension Component Replacement:

Procedures for replacing control arms, ball joints, tie rod ends, and other suspension and steering components.

📚 Vehicle History

Brand Heritage:

Mercedes-Benz, founded in 1926, has a long-standing reputation for engineering excellence, luxury, and pioneering automotive technology.

R Class Introduction:

The R-Class (W251) was introduced in 2005 (as a 2006 model year) and represented Mercedes-Benz's foray into the premium crossover segment. It was designed to offer a unique blend of space, comfort, and luxury.

Production Period:

2005-2017 (W251 generation)

🏆 Awards & Recognition

Safety Awards:

The 2007 R-Class received good safety ratings from IIHS and NHTSA, contributing to its appeal as a family vehicle. Specific awards may vary by publication and region.