Demanding driving

In demanding driving conditions, such as operating the vehicle in hot weather, towing a trailer, or driving for extended periods at higher altitudes than normal, it may be advisable to switch to higher octane fuel (91 or higher) or to change gasoline brands to fully utilize your engine's capacity, and for the smoothest possible operation.
NOTE
When switching to higher octane fuel or changing gasoline brands, it may be necessary to fill the tank more than once before a difference in engine operation is noticeable.
See also:
Deposit control gasoline (detergent additives)
Volvo recommends the use of detergent gasoline
to control engine deposits. Detergent
gasoline is effective in keeping injectors and
intake valves clean. Consistent use of deposit
control gasol ...
Headphone socket
External headphones can be connected to the
3.5 mm headphone socket on the side of the
head restraint (see the illustration on page
245 for the location of this socket). Adjust the
volume with ...
Facts about TSA
• TSA intervenes at speeds above approximately
40 mph (60 km/h)
• The DSTC symbol () in the
instrument
panel will flash when TSA is working
• If the driver switches off the DSTC system's
Spi ...
