2008 Volvo C30 Owner's Manual - Page 119

The vehicle can be driven through water up to a depth of approximately 9 in. (25 cm), at a maximum speed of 6 mph (10 km/h). Take particular care when driving through flowing water. Clean the electrical connections for trailer wiring after driving in mud or water. When driving through water, maintain low speed and do not stop in the water. WARNING After driving through water, press lightly on the brake pedal to ensure that the brakes are functioning normally. Water or mud can make the brake linings slippery, resulting in delayed braking effect. CAUTION Engine damage will occur if water is drawn into the air cleaner. If the vehicle is driven through water deeper than 9 in (25 cm), water may enter the differential and the transmission. This reduces the oil's lubricating capacity and may shorten the service life of these components. Do not allow the vehicle to stand in water up to the door sills longer than absolutely necessary. This could result in electrical malfunctions. If the engine has been stopped while the vehicle is in water, do not attempt to restart the engine. Have the vehicle towed out of the water. Cold weather precautions If you wish to check your vehicle before the approach of cold weather, the following advice is worth noting: Make sure that the engine coolant contains 50 percent antifreeze. Any other mixture will reduce freeze protection. This gives protection against freezing down to -31°F (-35°C). See section "Coolant." The use of "recycled" antifreeze is not approved by Volvo. Different types of antifreeze must not be mixed. Volvo recommends using only genuine Volvo antifreeze in your vehicle's radiator. Your Volvo retailer stocks plenty of Volvo engine coolant to help protect your vehicle during cold weather. Try to keep the fuel tank well filled - this prevents the formation of condensation in the tank. In addition, in extremely cold weather conditions it is worthwhile to add fuel line de-icer before refueling. The viscosity of the engine oil is important. Oil with low viscosity (thinner oil) improves cold-weather starting as well as decreasing fuel consumption while the engine is warming up. For winter use, 5W-30 oil, particularly the synthetic type1 , is recommended. Be sure to use good quality oil but do not use cold-weather oil for hard driving or in warm weather. See page 251 for more information. The load placed on the battery is greater during the winter since the windshield wipers, lighting, etc. are used more often. Moreover, the capacity of the battery decreases as the temperature drops. In very cold weather, a poorly charged battery can freeze and be damaged. It is therefore advisable to check the state of charge 1 Synthetic oil is not used when the oil is changed at the normal maintenance intervals except at owner request and at additional charge. Please consult a trained and qualified Volvo service technician. 134 06 Starting and driving General information more frequently and spray an anti-rust oil on the battery posts. Volvo recommends the use of snow tires on all four wheels for winter driving - see the chapter "Wheels and tires." To prevent the washer fluid reservoir from freezing, add washer solvents containing antifreeze (see page 202 for the location of the washer fluid reservoir). This is important since dirt is often splashed on the windshield during winter