This comprehensive owner's manual is specifically designed for the 2008 BMW 128i and 135i models, encompassing both Convertible and Coupe body styles equipped with the iDrive system. It provides a detailed guide to all aspects of your vehicle, including operation, maintenance, and safety features. Within its pages, you'll find clear instructions on how to utilize the iDrive system, navigate menus, and control various vehicle functions. The manual also details the proper use of all vehicle systems, including the engine, transmission, brakes, and climate control. Safety information is provided, covering emergency procedures, warnings, and system limitations. This manual serves as your ultimate resource for understanding and operating your BMW 128i or 135i, ensuring a safe and enjoyable driving experience.

The BMW 1 Series, launched in 2004, was a significant addition to the German marque's lineup, marking their entry into the premium compact segment. The 2008 model year saw the introduction of the second generation, with the 128i and 135i variants representing the epitome of sporty performance and refined luxury. Both models were available as a coupe or a convertible, each offering a distinct driving experience. The 128i was powered by a 3.0-liter inline-six engine generating 230 horsepower, while the 135i boasted a more powerful 3.0-liter twin-turbocharged engine delivering 300 horsepower. This potent engine, coupled with the 1 Series' compact dimensions and precise handling, provided an exhilarating driving experience. The 128i and 135i also featured BMW's acclaimed iDrive system, a revolutionary interface that allowed drivers to control various vehicle functions, including navigation, audio, and climate control, through a central rotary knob and a large display screen.

The 2008 BMW 128i and 135i convertibles offered an unparalleled combination of open-air driving enjoyment and premium comfort. The retractable soft-top roof could be lowered in a matter of seconds, allowing passengers to revel in the sun's warmth and the wind's caress as they cruised through city streets or scenic highways. The interior was meticulously crafted, featuring high-quality materials, ergonomic design, and ample space for both driver and passengers. The 1 Series convertibles were equipped with advanced safety features, including multiple airbags, anti-lock brakes, dynamic stability control, and traction control, ensuring a secure and enjoyable driving experience. Moreover, the 1 Series convertibles were praised for their fuel efficiency, achieving commendable gas mileage figures despite their powerful engines. Ultimately, the 2008 BMW 128i and 135i convertibles were highly sought-after vehicles for drivers who desired a blend of sporty performance, luxurious comfort, and open-air driving pleasure.