🏷️ Basic Information Identification Make: BMW Model: 1 Series Convertible / Coupe Model Variant: 128i / 135i Year: 2008 Body Style: Convertible, Coupe Market: USDM (United States Domestic Market) Product Type: Owner's Manual 👋 Introduction Market Position Market Segment: Entry-level luxury compact sports car/convertible. Competitive Analysis Key Competitors: Audi A3, Mercedes-Benz C-Class Coupe/Convertible, Infiniti G35 Coupe, Lexus IS Convertible. Key Features Driving Dynamics: Renowned BMW driving dynamics, rear-wheel drive architecture, balanced chassis. Powertrain Options: Naturally aspirated inline-six engines offering smooth power delivery. Infotainment: Introduction of the iDrive infotainment system for integrated control. Design: Sporty and compact styling, distinctive BMW kidney grille. 📋 Manual Details Coverage Areas Primary Coverage: Operation, maintenance, safety features, iDrive system, and basic troubleshooting for the 2008 BMW 128i and 135i Convertible and Coupe. Page Count Estimated Page Count: Approx. 250-350 pages (typical for BMW owner's manuals of this era) Manual Type Manual Type: Owner's Manual (User's Manual / Operator's Manual) Language Language: English Format Format: Printed 📖 Manual Coverage Systems Covered Powertrain: Engine operation, lubrication, cooling, fuel system basics (user-level), exhaust system overview. Chassis: Braking system overview, steering system, suspension system basics, wheel and tire information. Electrical: Lighting system, instrument cluster, power windows/locks/mirrors, basic fuse identification, battery care. Infotainment Idrive: Detailed operation of the iDrive system, navigation, climate control, audio system, Bluetooth connectivity, vehicle settings. Comfort Convenience: Climate control operation, seating adjustments, convertible top operation, interior features. Safety Security: Airbag system explanation, seatbelt usage, child restraint systems (ISOFIX/LATCH), tire pressure monitoring system (TPMS), alarm system. Procedures Included Maintenance Checks: Engine oil level check, coolant level check, brake fluid level check, windshield washer fluid refill, tire pressure adjustment, bulb replacement basics. Troubleshooting Basic: Warning lights interpretation, basic restart procedures, fault code display explanation (user-facing). Fueling Operation: Fuel type recommendations, fueling procedures, oil type and capacity recommendations. Emergency Procedures: Jump starting, flat tire changing (spare tire location/use or RFT system explanation), towing information. Technical Depth Depth: Owner-centric information focused on understanding and operating vehicle features, performing basic checks, and understanding warning indicators. Does not include detailed repair procedures or diagnostic steps typical of a service manual. 📊 Manual Specifications File Format File Format: N/A (Printed) Print Quality Print Quality: High-quality, professional printing, clear text and diagrams. Binding Type Binding Type: Staple-bound or Perfect-bound Paper Type Paper Type: Durable, glossy or semi-gloss paper stock suitable for automotive environments. ⚙️ Engine Specifications Primary Engine 128I Engine Code: N52B30 Engine Type: 3.0L Naturally Aspirated Inline 6-Cylinder Bore X Stroke: 85.0 mm x 88.0 mm Compression Ratio: 10.7:1 Horsepower: 230 hp @ 6500 rpm Torque: 200 lb-ft @ 2750 rpm Fuel Induction: Electronic Fuel Injection (EFI) with Valvetronic and Double VANOS Recommended Fuel: Premium Unleaded (91 octane or higher) Primary Engine 135I Engine Code: N54B30 Engine Type: 3.0L Twin-Turbocharged Inline 6-Cylinder Bore X Stroke: 84.0 mm x 89.6 mm Compression Ratio: 10.2:1 Horsepower: 300 hp @ 5800 rpm Torque: 300 lb-ft @ 1400 rpm Fuel Induction: Sequential Twin-Turbocharged Direct Injection (DI) with Double VANOS Recommended Fuel: Premium Unleaded (91 octane or higher) 🔧 Transmission Standard 128I Type: 6-speed manual (Getrag GS6-37BZ) Optional 128I Type: 6-speed automatic with Steptronic (ZF 6HP19) Standard 135I Type: 6-speed manual (Getrag GS6-53DZ) Optional 135I Type: 6-speed automatic with Steptronic (ZF 6HP19TU) Features Clutch Type: Hydraulic clutch actuation Automatic Features: Adaptive shift logic, manual shifting mode (Steptronic). 📐 Dimensions Coupe Exterior Length: 168.1 inches Width: 69.9 inches Height: 56.0 inches Wheelbase: 104.7 inches Convertible Exterior Length: 168.1 inches Width: 69.9 inches Height: 55.7 inches (top up) Wheelbase: 104.7 inches Cargo Coupe Trunk Volume: 15.0 cu ft Convertible Trunk Volume: 8.0 - 11.0 cu ft (top up/down) Weights Curb Weight 128I Coupe: 3329 lbs Curb Weight 135I Coupe: 3439 lbs Curb Weight 128I Convertible: 3825 lbs Curb Weight 135I Convertible: 3968 lbs 🛡️ Safety Features Ratings NHTSA Coupe Front Driver: 5-Star NHTSA Coupe Front Passenger: 5-Star NHTSA Coupe Side Front Driver: 5-Star NHTSA Coupe Side Front Passenger: 5-Star NHTSA Coupe Side Rear: 4-Star NHTSA Coupe Rollover: 4-Star Active Features Stability Control: Dynamic Stability Control (DSC), Traction Control System (TCS). Braking: Anti-lock Braking System (ABS), Electronic Brake-force Distribution (EBD), Brake Assist. Tire Monitoring: Tire Pressure Monitoring System (TPMS). Passive Features Airbags: Front airbags, side-impact airbags, front knee airbags (optional/standard depending on configuration). Convertible Roll Protection: Pop-up rollover protection system (integrated behind rear seats). Seat Belts: 3-point inertia-reel seat belts with front seat-belt tensioners and force limiters. 💡 Technology Features Infotainment System Name: iDrive (CCC or CIC depending on specific options/updates) Display: Central LCD display integrated into the dashboard. Controls: iDrive controller knob and buttons on the center console. Features: Navigation, climate control, audio system (radio, CD player, possibly auxiliary input), phone connectivity (Bluetooth). Driver Assistance Cruise Control: Standard cruise control. Parking Assistance: Optional rear parking sensors (PDC - Park Distance Control). Connectivity Phone Integration: Bluetooth hands-free calling, potentially Bluetooth audio...