🏷️ Basic Information

Make:

Mercedes-Benz

Model:

CLK-Class

Model Codes:

C209 (Coupe), A209 (Convertible)

Year:

2004

Chassis Code:

C209 / A209

👋 Introduction

Model Segment:

Entry-level luxury coupe and convertible (Grand Tourer).

Competitors 2004:

BMW 3 Series Coupe/Convertible (E46), Audi A4 Cabriolet, Lexus SC 430.

Design Philosophy:

Combines Mercedes-Benz luxury, comfort, and performance with a sporty aesthetic and engaging driving dynamics.

Target Audience:

Discerning buyers seeking a stylish, comfortable, and reliable German luxury coupe or convertible.

📋 Manual Details

Coverage Statement:

All Models & All Repairs A-Z

Page Count:

Estimated 1500+ pages (typical for comprehensive dealer service manuals)

Manual Type:

Official Dealer Service & Repair Manual

Language:

English

Format:

Digital (likely PDF or similar, searchable)

📖 Manual Coverage

Engine Mechanical:

Engine assembly, cylinder head, crankshaft, pistons, connecting rods, camshafts, timing system, lubrication system, cooling system, intake manifold, exhaust manifold, engine diagnostics.

Engine Performance:

Fuel injection system (EFI), ignition system, emissions control, engine management system (ECU/ECM) diagnostics and programming, turbocharging/supercharging (if applicable to specific models covered).

Transmission:

Automatic Transmission (e.g., 5G-TRONIC 722.6) overhaul, diagnosis, shifting characteristics, transmission control module (TCM), manual transmission (if applicable) service.

Drivetrain:

Front axle, rear axle, drive shafts, CV joints, differential, propshaft, wheel bearings, torque converter.

Brakes:

Hydraulic system, ABS (Anti-lock Braking System), ESP (Electronic Stability Program), brake discs, brake pads, brake calipers, brake lines, parking brake, brake booster, hydraulic unit.

Suspension:

Front suspension (e.g., McPherson strut, multi-link), rear suspension, shock absorbers, springs, control arms, anti-roll bars, power steering system, steering rack, power steering pump.

Electrical System:

Battery, alternator, starter motor, lighting system (headlights, taillights, interior), wiring diagrams, fuse box locations, relay functions, power distribution.

Body And Chassis:

Body panels, doors, hinges, locks, windows, mirrors, convertible top mechanism (for A209), chassis frame, bumpers, body repair procedures, corrosion protection.

HVAC:

Heating, Ventilation, and Air Conditioning (HVAC) system, refrigerant circuits, compressor, condenser, evaporator, climate control module, blower motor, actuators, diagnostic procedures.

Interior:

Seating systems, dashboard, instrument cluster, trim panels, airbags, seat belts, interior lighting, infotainment system, switches, controls.

Diagnostics And Troubleshooting:

OBD-II (On-Board Diagnostics) system, fault codes (DTCs), diagnostic scan tool usage, symptom-based troubleshooting guides, repair procedures based on fault detection.

Maintenance Tasks:

Oil changes, filter replacements (oil, air, cabin, fuel), spark plug replacement, brake fluid flush, coolant flush, transmission fluid service, differential fluid service, tire rotation, belt replacement.

Repair Procedures:

Engine component replacement (e.g., starter, alternator, water pump), transmission rebuild, brake system component replacement, suspension component replacement, electrical component diagnosis and replacement, body panel repair, convertible top repair.

Troubleshooting Guides:

Step-by-step diagnostic trees for common and uncommon problems, electrical system fault finding, drivability issues, noise diagnosis, performance problems.

Technical Specifications:

Torque specifications for all fasteners, fluid capacities and types, electrical system voltages, diagnostic data, component tolerances, engine timing specifications.

Special Tools:

Identification and usage of specialized Mercedes-Benz tools required for specific repairs and diagnostics.

Depth Of Coverage:

Comprehensive from routine maintenance to complete engine and transmission overhauls, including electrical schematics and detailed diagnostic routines.

📊 Manual Specifications

File Format:

PDF (high-resolution, searchable text, vector graphics for diagrams)

Print Quality:

High-resolution images, clear diagrams, legible text suitable for printing specific sections.

Binding Type:

N/A (Digital format)

Paper Type:

N/A (Digital format)

⚙️ Engine Specifications

Engine 1 Variant:

2.6L V6 (M112 E26)

Engine 1 Power:

168 hp @ 5700 rpm

Engine 1 Torque:

177 lb-ft @ 4500 rpm

Engine 2 Variant:

3.2L V6 (M112 E32)

Engine 2 Power:

215 hp @ 5700 rpm

Engine 2 Torque:

221 lb-ft @ 3000-4500 rpm

Engine 3 Variant:

5.0L V8 (M113 E50) - CLK500

Engine 3 Power:

302 hp @ 5600 rpm

Engine 3 Torque:

339 lb-ft @ 2700-4250 rpm

Configuration:

V6 (SOHC 3 valves per cylinder) and V8 (SOHC 3 valves per cylinder) with 2 spark plugs per cylinder.

0 60 Mph Clk320:

Approx. 6.7 seconds

0 60 Mph Clk500:

Approx. 5.4 seconds

Fuel Delivery:

Sequential Multi-Port Fuel Injection (SFI).

Fuel Type:

Premium Unleaded (91 octane or higher recommended).

🔧 Transmission

Transmission Type:

5-speed Automatic Transmission (722.6 '5G-TRONIC')

Optional Transmission:

N/A for 2004 models in most markets (7-speed 722.9 introduced later).

Transmission Modes:

Comfort (C) and Sport (S) modes.

📐 Dimensions

Length:

4653 mm (183.2 in)

Width:

1740 mm (68.5 in)

Height:

1410 mm (55.5 in)

Length:

4653 mm (183.2 in)

Width:

1740 mm (68.5 in)

Height:

1409 mm (55.5 in)

Wheelbase:

2715 mm (106.9 in)

Curb Weight Clk320:

Approx. 1570 kg (3461 lbs)

Curb Weight Clk500:

Approx. 1680 kg (3704 lbs)

Trunk Volume Coupe:

Approx. 430 L (15.2 cu ft)

Trunk Volume Convertible:

Approx. 300 L (10.6 cu ft) with top up, 240 L (8.5 cu ft) with top down.

🛡️ Safety Features

NHTSA Front Impact:

5-Star Rating (for 2004 model year, based on typical Mercedes-Benz safety).

IIHS Side Impact:

Good (typical for models with side airbags).

Active Safety Systems:

Anti-lock Braking System (ABS), Electronic Stability Program (ESP), Traction Control System (TCS).

Passive Safety Features:

Front airbags, front side airbags, front and rear head curtain airbags (optional/standard depending on market), seatbelt pretensioners, crumple zones, rollover protection (for convertible).

💡 Technology Features

Infotainment System:

COMAND (Cockpit Management and Navigation) system available on many models, featuring CD player, AM/FM radio, optional navigation, and early Bluetooth integration.

Sound System Options:

Standard 8-speaker system, optional Bose premium audio.

Driver Assistance Features:

Cruise control, optional Parktronic parking assist, rain-sensing wipers, automatic climate control.

Connectivity Options:

Optional hands-free communication system (Bluetooth or proprietary Mercedes-Benz system).

🔧 Maintenance

Major Service Interval:

Typically every 10,000 miles or 12 months, whichever comes first, for routine checks and oil changes. Larger interval services (e.g., spark plugs, transmission fluid) vary by model and driving conditions, as specified by the Assyst system.

Engine Oil Type:

Mobil 1 Synthetic or equivalent, meeting Mercedes-Benz Specification 229.5 (e.g., SAE 0W-40 or 5W-40).

Transmission Fluid Type:

MB 236.10 ATF (e.g., Mobil ATF 134).

Coolant Type:

Mercedes-Benz Approved Antifreeze/Coolant (Glycol-based, phosphate-free), Specification 325.0 or 326.0, typically a 50/50 mix with distilled water.

Brake Fluid Type:

DOT 4 Plus (e.g., Pentosin Super DOT 4).

Common Wear Items:

Worn suspension bushings, aging ignition coils, MAF sensor issues, oil cooler seals, potentially rear main seal leaks, door panel creaking (interior trim).

Convertible Top Mechanism:

Hydraulic lines can develop leaks, roll bar sensors, wear in the fabric or seals, requiring specialized attention found in this manual.

Electrical Gremlins:

Can occur due to aging wiring harnesses or module failures, often solvable with proper diagnostic procedures.

📚 Vehicle History

Brand History:

Mercedes-Benz, founded in 1926, is renowned for engineering excellence, luxury, safety, and performance.

C209 A209 Generation:

Second generation CLK-Class (C209/A209) introduced in 2002, replacing the C208. This generation shared its platform with the W203 C-Class.

Production Years:

2002-2010 (C209/A209 generation).

Manufacturing Locations:

Mainly Germany (Sindelfingen).

🏆 Awards & Recognition

Historical Accolades:

While specific awards for the 2004 model might be granular, the CLK-Class line consistently received praise for its styling, build quality, and refinement in the luxury coupe/convertible segment.