🏷️ Basic Information

Make:

Mercury

Model:

Grand Marquis

Year:

2009

Platform:

Panther Platform (Fourth Generation)

Platform Code:

D-Platform

👋 Introduction

Vehicle Segment:

Full-size sedan, often positioned as a comfortable and reliable cruiser

Key Competitors:

Chevrolet Impala, Buick LaCrosse (previous generation), Chrysler 300 (RWD variants)

Vehicle Strengths:

Spacious interior, comfortable ride, powerful V8 engine, rear-wheel drive platform, durable construction

Diy Benefits:

Empowers owners to perform maintenance and repairs, saving significant costs compared to professional services

Information Access:

Provides instant access to factory-derived data, superior to outdated or generic print manuals

📋 Manual Details

General Coverage:

Comprehensive service and repair information

Specific Systems:

Engine, Drivetrain, Brakes, Suspension, Steering, Electrical, HVAC, Body, Emissions

Estimated Pages:

Extensive (Digital format provides dynamic content, typically equivalent to thousands of printed pages)

Type:

Service and Repair Manual Software (Online Access)

Language:

English

Access Method:

Online Web Browser

Compatibility:

PC, Laptop, Smartphone, Tablet (Requires Internet Connection)

Licensing Status:

Officially Licensed

Licensing Source:

OE (Original Equipment) Materials

Initial Access:

1 Year

Renewal Options:

Discounts available for additional years

📖 Manual Coverage

Powertrain Engine:

Detailed diagnostics, repair, and overhaul for the 4.6L V8 engine

Powertrain Transmission:

Service and repair for the 4-speed automatic transmission (4R75W)

Chassis Suspension:

Front and rear suspension component diagnosis, replacement, and alignment procedures

Chassis Steering:

Power steering system components, steering linkage, and column service

Chassis Brakes:

Front and rear brake system service, including disc brake components, hydraulic system, and parking brake

Electrical System:

Wiring diagrams, component testing, charging system, starting system, lighting, and power accessories

HVAC:

Heating, ventilation, and air conditioning system diagnosis and repair

Body And Trim:

Interior and exterior trim, doors, windows, locks, and body panel repair

Emission Control:

Emissions system components and diagnosis

Maintenance Tasks:

Routine checks, fluid changes, filter replacements, tune-ups

Troubleshooting:

Systematic diagnostic procedures for common and complex issues

Repair Procedures:

Step-by-step instructions for component replacement and repair

Component Rebuilds:

Instructions for rebuilding major components where applicable

Wiring Diagrams:

Detailed electrical schematics for all vehicle systems

Depth Level:

Factory-level technical information for both DIY enthusiasts and professional technicians

Diagnostic Capabilities:

Includes procedures for using diagnostic tools and interpreting fault codes

📊 Manual Specifications

Digital Format:

Web-based application

Visual Fidelity:

High-resolution graphics, diagrams, and photographs

Binding:

N/A (Digital Format)

Paper Quality:

N/A (Digital Format)

Text Search:

Fully searchable text content for quick information retrieval

⚙️ Engine Specifications

Engine Code:

4.6L SOHC V8 (Modular Triton)

Engine Displacement:

4.6 Liters (281 cubic inches)

Bore X Stroke:

3.55 in x 3.14 in (90.2 mm x 79.8 mm)

Compression Ratio:

9.3:1

Cylinder Head Design:

SOHC (Single Overhead Cam), 3 valves per cylinder (2 intake, 1 exhaust)

Horsepower:

224 hp @ 4,800 rpm

Torque:

275 lb-ft @ 4,000 rpm

Induction Type:

Sequential Electronic Fuel Injection (SEFI)

Fuel Requirement:

Regular Unleaded Gasoline (87 Octane Minimum)

ECM Type:

PCM (Powertrain Control Module) with integrated VCM (Vehicle Control Module)

🔧 Transmission

Transmission Type:

4-speed Automatic Overdrive

Transmission Model:

4R75W

Drive Layout:

Rear-Wheel Drive (RWD)

Transmission Fluid Type:

MERCON V Automatic Transmission Fluid

Transmission Fluid Capacity:

Approximately 11.7 quarts (11.1 Liters) for a complete fluid service

📐 Dimensions

Length:

210.2 inches (5339 mm)

Width:

78.2 inches (1986 mm)

Height:

58.0 inches (1473 mm)

Wheelbase:

114.7 inches (2913 mm)

Front Track:

62.7 inches (1593 mm)

Rear Track:

63.1 inches (1603 mm)

Trunk Volume:

20.6 cubic feet (583 Liters)

Curb Weight:

Approximately 4,030 - 4,100 lbs (1,828 - 1,860 kg)

Gross Vehicle Weight Rating Gvwr:

5,300 lbs (2,404 kg)

🛡️ Safety Features

NHTSA Front Driver Impact:

5-Star

NHTSA Front Passenger Impact:

5-Star

NHTSA Side Driver Impact:

4-Star

NHTSA Side Passenger Impact:

4-Star

NHTSA Rollover Rating:

4-Star

ABS:

Standard Anti-lock Braking System (ABS)

Traction Control:

Standard Traction Control System (TCS)

Airbags:

Dual-stage front airbags, front side-impact airbags

Seatbelts:

Pretensioner front seatbelts

💡 Technology Features

Audio System:

Standard AM/FM stereo with CD player and 6 speakers. Optional premium audio systems and Sirius Satellite Radio were available.

Cruise Control:

Standard electronic cruise control

Parking Assist:

Optional rear parking assist sensors

Bluetooth:

Not standard on all models; may be available on higher trims or as an aftermarket addition

Climate Control:

Manual climate control or optional dual-zone automatic climate control

🔧 Maintenance

Oil Change Interval:

Every 5,000 miles or 6 months, whichever comes first (or as per specific oil type and driving conditions)

Air Filter Replacement:

Recommended every 15,000 - 30,000 miles, or as needed based on inspection

Spark Plug Replacement:

Typically around 100,000 miles for the coil-on-plug ignition system

Coolant Flush:

Every 30,000 - 50,000 miles or 3-5 years

Engine Oil Specification:

SAE 5W-20 (meeting Ford Specification WSS-M2C153-H)

Coolant Specification:

Ford Premium Engine Coolant (Green) or equivalent, a 50/50 mixture with distilled water

Engine Oil Capacity:

6 quarts (5.7 Liters) with filter change

Common Wear Items:

Front and rear suspension bushings, ball joints, tie rod ends, brake pads and rotors, exhaust system components

Powertrain Longevity:

The 4.6L V8 and 4R75W transmission are generally robust and capable of high mileage with proper maintenance. Potential issues can include occasional transmission solenoid failures or minor oil leaks.

Electrical Quirks:

Minor electrical issues such as malfunctioning door locks, window regulators, or interior lighting can occur over time, typically addressed via wiring diagnostics and component replacement.

📚 Vehicle History

Mercury Legacy:

Mercury was Ford's mid-tier brand, established in 1939, aiming to bridge the gap between Ford and Lincoln. The Grand Marquis was a flagship model, known for its comfort and V8 power, carrying on the tradition of large American sedans.

Grand Marquis Lineage:

The Grand Marquis originated as a top trim level of the Mercury Marquis in the 1970s. The model line evolved through generations, with the 2009 model being part of the Panther Platform's final iteration, which also underpinned the Ford Crown Victoria and Lincoln Town Car.

Production Era:

The Mercury brand was discontinued in 2011. The Panther Platform vehicles, including the Grand Marquis, ceased production in early 2012. The 2009 model year represents the later years of this robust and well-established platform.

🏆 Awards & Recognition

General Reputation:

While not typically winning specific awards in 2009, the Grand Marquis has a long-standing reputation for reliability, comfort, and durability within its segment, particularly among fleet buyers and those prioritizing a traditional large sedan experience.