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    Exhaust check
    WARNING Inhalation of exhaust gas is hazardous to your health. All exhaust gas contains carbon monoxide (CO), and inhaling it can cause unconsciousness and possible death. Do not run the engi ...

    Tire tread
    WARNING Although the applicable federal motor vehicle safety laws consider a tire to be worn when the tread wear indicators (TWI) become visible at approximately 1/16 in (1.6 mm), we recomme ...

    Running the Numbers
    Thanks to diesel engines' higher efficiency, the Bluetec achieves nearly the same EPA ratings as a Cadillac Escalade Hybrid. The figures are 27 percent better overall than those of the gas GL450, ...