2009 BMW 5 Series Owner's Manual - Page 223

verter will result. Do not use E85, i.e. fuel that consists of 85% ethanol, or Flex Fuel. Otherwise permanent damage to the engine and the fuel supply system will result.< Required fuel Super Premium Gasoline/AKI 91 Place the fuel filler cap in the bracket attached to the fuel filler door. When refueling, insert the filler nozzle completely into the filler pipe. Avoid raising the filler nozzle during refueling, otherwise this leads to > premature pump shutoff > a reduced efficiency of the fuel-vapor recovery system. The fuel tank is full when the filler nozzle clicks off the first time. This gasoline is highly recommended. However, you may also use gasoline with less AKI. The minimum AKI Rating is 87. If you use gasoline with this minimum AKI Rating, the engine may produce knocking sounds when starting at high outside temperatures. This has no affect on the engine life. Do not use gasoline below the specified minimum quality, otherwise engine damage can result.< Controls Reference Mobility Communications Entertainment Navigation Driving tips Fuel tank capacity Approx. 18.5 US gal/70 liters, including approx. 2.1 US gal/8 liters reserve capacity. 550i: approx. 2.6 US gal/10 liters reserve capacity. Refuel as soon as possible once your cruising range falls below 30 miles/ 50 km, otherwise engine functions are not ensured and damage can occur.< Use high-quality brands Field experience has indicated significant differences in fuel quality: volatility, composition, additives, etc., among gasolines offered for sale in the United States and Canada. Fuels containing up to and including 10% ethanol or other oxygenates with up to 2.8% oxygen by weight, that is, 15% MTBE or 3% methanol plus an equivalent amount of co-solvent, will not void the applicable warranties with respect to defects in materials or workmanship. The use of poor-quality fuels may result in drivability, starting and stalling problems especially under certain environmental conditions such as high ambient temperature and high altitude. Should you encounter drivability problems which you suspect could be related to the fuel you are using, we recommend that you respond by switching to a recognized high-quality brand such as gasoline that is advertised as Top Tier Detergent Gasoline. Failure to comply with these recommendations may also result in unscheduled maintenance.< Fuel filler cap Closing Fit the cap and turn it clockwise until you clearly hear a click. Do not crush the band attached to the cap; otherwise, the cap may not properly seal and fuel vapors can escape.< A message* is displayed if the cap is loose or missing. Fuel specifications Do not use leaded gasoline, otherwise permanent damage to the catalytic con- 221 Online Edition for Part no. 01 41 2 600 721 - © 08/08 BMW AG At a glance