🏷️ Basic Information

Make:

Mercedes-Benz

Model:

R350

Year:

2009

Chassis Code:

W251

👋 Introduction

Market Position:

The 2009 Mercedes-Benz R350 (W251) represented Mercedes-Benz's unique take on a 'Grand Sports Tourer,' blending SUV practicality with minivan space and luxury sedan comfort. It aimed to capture a niche market seeking versatility without compromising on premium features and brand prestige.

Competitive Analysis:

Competed with vehicles like the BMW X5, Audi Q7, and Volvo XC90, as well as luxury minivans and large crossovers. Its distinct styling and focus on interior comfort and technology were key differentiators.

Key Features:

Spacious and versatile interior, premium Mercedes-Benz build quality and materials, advanced safety features, powerful V6 engine, optional 4MATIC all-wheel drive, comfortable ride quality.

📋 Manual Details

Coverage Areas:

Engine, Transmission, Drivetrain, Suspension, Steering, Brakes, Electrical System, HVAC, Body, Interior

Page Count:

Extensive (Software - content equivalent to multiple print volumes)

Manual Type:

Official Service and Repair Manual Software

Language:

English

Format:

Digital Software (Likely PDF or proprietary viewer)

📖 Manual Coverage

Systems Covered:

Engine mechanical and electronic controls, 7G-TRONIC automatic transmission, 4MATIC all-wheel drive, suspension components (front and rear), steering system, anti-lock braking system (ABS), electronic stability program (ESP), lighting, instrument cluster, comfort systems (seats, climate control), power accessories, body panel removal and installation, wiring diagrams, diagnostic trouble codes (DTCs).

Procedures Included:

Routine maintenance, scheduled services, troubleshooting guides, component diagnostics, repair procedures for all major systems, component removal and installation, tightening specifications, fluid level checks and changes, diagnostic flowcharts, electrical system schematics.

Technical Depth:

Comprehensive from basic inspections and fluid changes to complex engine and transmission rebuilds, including advanced electronic system diagnostics and repair.

📊 Manual Specifications

File Format:

Software Application / Digital Document

Print Quality:

N/A (Digital Format)

Binding Type:

N/A (Digital Format)

Paper Type:

N/A (Digital Format)

⚙️ Engine Specifications

Primary Engine:

3.5L V6 M272 E35

Horsepower:

268 hp @ 6000 rpm

Torque:

258 lb-ft @ 2400-5000 rpm

Fuel System:

Electronic Fuel Injection (EFI) - Sequential Multi-Port Fuel Injection (MPI)

Engine Codes:

M272.970

Bore Stroke:

92.9 mm x 86.0 mm

Compression Ratio:

10.7:1

Valvetrain:

DOHC, 4 valves per cylinder, variable valve timing (VVT)

🔧 Transmission

Standard Transmission:

7-speed automatic (7G-TRONIC)

Optional Transmission:

N/A for 2009 R350

Features:

Driver-adaptive, electronically controlled with auto-shift bypass, touch shift, sport and comfort modes. Optional paddle shifters.

Drivetrain:

Rear-Wheel Drive (RWD) and 4MATIC All-Wheel Drive (AWD)

Transmission Fluid Spec:

MB 236.12 or MB 236.14 (Check specific vehicle build)

📐 Dimensions

Length:

199.9 inches

Width:

77.1 inches

Height:

67.1 inches

Wheelbase:

118.1 inches

Seating Capacity:

6 or 7 passengers

Cargo Volume Behind 3Rd Row:

12.4 cu ft

Cargo Volume Behind 2Nd Row:

42.0 cu ft

Cargo Volume Behind 1St Row:

87.6 cu ft

Curb Weight:

Approx. 4,600 - 4,900 lbs (depending on configuration)

Towing Capacity:

3,500 lbs (with optional trailer hitch)

🛡️ Safety Features

NHTSA Front Impact Rating:

5-Star

NHTSA Side Impact Rating:

5-Star

IIHS Top Safety Pick:

Yes (for 2009 model year)

Active Features:

Anti-lock Braking System (ABS), Electronic Stability Program (ESP), Traction Control System (TCS), Brake Assist (BAS), all-wheel drive (4MATIC).

Passive Features:

Front dual-stage airbags, front side-impact airbags, side curtain airbags (front and rear), active front head restraints, front 3-point seat belts with pre-tensioners and load limiters, rear 3-point seat belts, LATCH child seat anchors.

Optional Features:

Bi-Xenon headlamps with adaptive front-lighting system (AFS), PARKTRONIC parking assist, rearview camera.

💡 Technology Features

Infotainment System:

COMAND APS (Cockpit Management and Navigation EXpert) with 6.5-inch color display, CD/DVD player, AM/FM radio, navigation system, and optional Harman Kardon surround sound audio system.

Auxiliary Input:

Standard auxiliary audio input, optional USB integration.

Driver Assistance:

Available features include: PARKTRONIC (parking sensors front and rear), rearview camera, cruise control. Electronic Stability Program (ESP) and ABS are standard.

Connectivity Features:

Bluetooth hands-free communication, voice control (LINGUATRONIC).

Convenience Features:

Power liftgate, power sunroof, multi-zone climate control, heated and ventilated seats (optional), power adjustable pedals.

🔧 Maintenance

Service A Interval:

Approximately 10,000 miles or 12 months (based on flexible service system, actual interval may vary).

Service B Interval:

Approximately 20,000 miles or 24 months (based on flexible service system, actual interval may vary).

Engine Oil Spec:

MB 229.5 (e.g., Mobil 1 0W-40 Synthetic)

Engine Oil Capacity:

Approx. 8.5 US quarts (8.0 Liters)

Coolant Spec:

MB 325.0 / MB 326.0 (Glycol-based, blue or green)

Brake Fluid Spec:

DOT 4 Plus (MB 331.0)

Power Steering Fluid Spec:

MB 236.3 (ATF Dexron III compatible)

Known Issues:

Potential for ignition coil failure, intake manifold runner flap failure (M272 engine), transmission control module issues, balance shaft gear wear (on earlier M272 engines - though 2009 is less prone, it's still a consideration), sagging headliner, and occasional electrical gremlins. The manual will provide detailed diagnostic procedures for these.

Spark Plug Part Number:

NGK Iridium (e.g., ILFR602N or equivalent)

Air Filter Part Number:

e.g., Mann-Filter C35184/2, Bosch 0986452070

📚 Vehicle History

Brand Heritage:

Mercedes-Benz boasts a long history of luxury vehicle manufacturing, renowned for engineering excellence, comfort, and innovation since its inception.

Model Evolution:

The R-Class (W251) was introduced in 2006 as a novel concept, the 'Grand Sports Tourer,' designed to bridge the gap between SUVs and minivans. The 2009 model year saw minor updates and refinements. It was positioned as a premium family vehicle with a focus on passenger comfort and versatility.

Production Location:

Tuscaloosa, Alabama, USA

Production Years:

2006 - 2012

🏆 Awards & Recognition

Recognitions:

While specific awards for the 2009 R350 are less publicized than some Mercedes-Benz models, its class and focus on safety and comfort were generally well-regarded within its niche. The IIHS Top Safety Pick award is a significant recognition.

Ratings:

Generally received positive reviews for ride comfort, interior space, and safety. Criticisms often focused on its polarizing styling and perceived value compared to more traditional SUVs.