Segment:
Executive / Luxury Sedan
Target Audience:
Citroën authorized service technicians, professional mechanics, and advanced DIY enthusiasts.
Competitors:
Peugeot 607, Renault Vel Satis, BMW 5 Series, Mercedes-Benz E-Class, Audi A6, Volkswagen Passat.
Unique Selling Points:
The C6 is known for its distinctive design, advanced technology (e.g., hydropneumatic suspension on some variants), and comfort-focused interior, positioning it as a unique offering in the executive segment.
Manual Value Proposition:
Provides authorized dealer-level technical information to ensure correct and efficient servicing, maintenance, and repair, leading to optimal vehicle performance and longevity.
General:
Comprehensive coverage of all major vehicle systems.
Engine Mechanical:
Detailed information on engine assembly, disassembly, diagnostics, and repair for all specified engine variants.
Engine Management:
Covers fuel injection systems (likely indirect and direct) and ignition systems, including component testing and ECU functions.
Transmission:
In-depth coverage of gearbox operation, maintenance, and repair. Likely includes automatic and manual transmissions if offered.
Drivetrain:
Detailed information on the transaxle, driveshafts, and axles, including maintenance and repair procedures.
Suspension:
Covers front and rear suspension systems, alignment procedures, component replacement, and diagnostics.
Steering:
Detailed information on steering system components, operation, maintenance, and repair, including hydraulic or electric power steering.
Brakes:
Comprehensive coverage of the braking system, including hydraulic components, ABS, and any electronic stability control systems.
Hydraulics:
Specific section dedicated to hydraulic systems, potentially covering hydropneumatic suspension, power steering, or brake hydraulics.
Climate Control:
Detailed information on the air conditioning system, including refrigerant handling, component testing, and repair.
Restraints:
Covers safety restraint systems, primarily airbags and seatbelts, including diagnostic procedures and replacement guidelines.
Maintenance:
Routine maintenance procedures, fluid changes, filter replacements, and inspections.
Troubleshooting:
Diagnostic flowcharts and symptom-based troubleshooting guides for common issues.
Repair:
Step-by-step instructions for component removal, installation, and repair for all covered systems.
Diagnostics:
Information on diagnostic tools, sensor testing, actuator testing, and interpreting diagnostic trouble codes (DTCs).
Electrical System:
Wiring diagrams, component locations, and troubleshooting for the vehicle's electrical systems (though not explicitly listed in contents, expected in a comprehensive manual).
Depth:
Expert Level. Designed for authorized dealer service technicians, indicating a high level of detail suitable for complex diagnostics and repairs.
Scope:
Comprehensive. Covers all aspects from routine maintenance to major component overhauls and advanced diagnostics.
Format Type:
Digital (likely PDF, or equivalent) or high-quality print.
Quality:
High quality (stated as 'not scanned version').
Binding:
Not Applicable (if digital) or Professional (if printed).
Paper:
Not Applicable (if digital) or High-Quality, Durable Paper (if printed).
Engine Options:
3.0L V6 Petrol (likely ES9 V6 PSA engine) and 2.7L HDi V6 Diesel (common rail direct injection).
3.0L V6 Petrol Horsepower:
Approximately 211 PS (155 kW / 208 hp) at 6000 rpm (typical for this engine).
3.0L V6 Petrol Torque:
Approximately 290 Nm (214 lb-ft) at 3750 rpm (typical for this engine).
2.7L Hdi V6 Diesel Horsepower:
Approximately 204 PS (150 kW / 201 hp) at 4000 rpm (typical for this engine).
2.7L Hdi V6 Diesel Torque:
Approximately 440 Nm (325 lb-ft) at 1900 rpm (typical for this engine).
Petrol Injection:
Likely Multi-point Fuel Injection (MPI) or direct injection depending on specific variant.
Diesel Injection:
Common Rail Direct Injection (HDi).
Petrol Engine Code:
Likely ES9A or similar PSA V6 designation.
Diesel Engine Code:
Likely DW12BTED4 or similar PSA V6 HDi designation (though this is a 4-cylinder, the 2.7 is related to Jaguar/Ford AJD-V6 / PSA DT17).
Transmission Type:
Likely a 6-speed automatic transmission (e.g., ZF 6HP26).
Transmission Options:
Manual transmission unlikely for this executive model and engine configurations.
Automatic Features:
Tiptronic (manual selection), adaptive shifting programs, potentially Sport mode.
Length:
Approx. 4,967 mm (195.6 in)
Width:
Approx. 1,891 mm (74.4 in)
Height:
Approx. 1,495 mm (58.9 in)
Curb Weight Petrol:
Approx. 1,750 - 1,800 kg (3,858 - 3,968 lbs)
Curb Weight Diesel:
Approx. 1,850 - 1,900 kg (4,079 - 4,189 lbs)
Euroncap Rating:
4 Stars (Achieved in 2006 for adult occupant protection).
ABS:
Standard Anti-lock Braking System.
Esp:
Standard Electronic Stability Program (ESP).
Lane Departure Warning:
Optional feature available on some trims.
Airbags:
Multiple airbags: front, side, curtain, and driver's knee airbag.
Seatbelts:
Pre-tensioning seatbelts with force limiters.
System:
Integrated infotainment system with navigation, radio, CD player, and potentially Bluetooth connectivity.
Features:
Keyless entry and start, parking sensors, cruise control, and optional Lane Departure Warning system.
Options:
Bluetooth hands-free calling and audio streaming capabilities may be present depending on trim level and optional equipment.
Oil Change Petrol:
Typically 20,000 km (12,500 miles) or 2 years, whichever comes first (check specific model variant for exact interval).
Oil Change Diesel:
Typically 20,000 km (12,500 miles) or 2 years, whichever comes first (check specific model variant for exact interval).
Timing Belt Petrol:
Typically 120,000 km (75,000 miles) or 10 years, whichever comes first (for the V6 engine, often a timing chain is used, but belt intervals are critical if applicable).
Timing Belt Diesel:
Typically 150,000 km (93,000 miles) or 10 years, whichever comes first (for HDi engines, although V6 diesels might have belts or chains).
Engine Oil Petrol Viscosity:
Likely 5W-30 or 5W-40 meeting PSA B71 2290/2294 standards.
Engine Oil Diesel Viscosity:
Likely 5W-30 meeting PSA B71 2290 standards (low SAPS).
Transmission Fluid Automatic:
Specific ATF for ZF 6HP26 transmission (e.g., Lifeguard 6).
Coolant:
Ethylene glycol-based coolant with anti-corrosion additives, typically PSA specification (e.g., GLACEOL RX Type D).
Suspension:
While the C6 often features advanced hydractive suspension, potential issues can include leaks, sensor failures, or pump issues, requiring specialized knowledge for repair.
Electronics:
As with many advanced vehicles of this era, electrical gremlins, sensor malfunctions, and issues with infotainment systems can occur, necessitating thorough diagnostic procedures.
Diesel Particulate Filter:
For the 2.7 HDi, DPF regeneration issues or clogging can be a concern, especially with predominantly urban driving cycles.
Citroen Philosophy:
Citroën has a long history of innovation and avant-garde design, particularly in suspension technology (e.g., DS) and comfort-oriented vehicles.
C6 Lineage:
The C6 succeeded the Citroën XM, aiming to re-establish Citroën's presence in the large luxury sedan segment. It drew inspiration from the C5 and concepts like the C6 Lignage concept car.
Production Period:
2005 - 2012
Manufacturing Location:
Rennes-la-Janais plant, France.
