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The rain sensors automatically regulate the frequency of your windscreen wipers, according to how heavily it is raining.

Our rain sensors mean you won't have to keep switching your wipers on and off, or adjusting their speed, according to how hard it is raining. This clever system uses an LED sensor, fitted behind your internal mirror, to detect the amount of rain falling on your windscreen and adjusts the wiper accordingly.

You can also choose different settings, depending on how sensitive you want the rain sensor to be. If you choose the most sensitive setting the wipers will clean off just a few spots of rain, whilst the least sensitive setting will wait a little longer before starting to work. And you don't even have to worry about reversing. When the sensor is on and you select reverse gear, the rear wipers will automatically wipe away any rain.

The sensor system consists of a number of infrared light-emitting diodes (LEDs) and a central photodiode. The light emitted by the LEDs is reflected by the windscreen onto the photo sensor. The more drops of water there are on the windscreen, the less light the sensor receives. This information is passed to an electronic control unit, which adapts the wipe intervals of the windscreen wiper accordingly.

And the design means that dirt, minor defects and ageing of the windscreen do not impair its efficiency. You'll find driving in wet conditions safer and more comfortable because the rain sensor does the hard work, leaving you to concentrate fully on the road. It's especially useful in situations when your visibility is suddenly impaired - while overtaking lorries on a wet road, for example.

Article source: www.volkswagen.co.uk

The world’s most fuel-efficient car, the Volkswagen XL1, which was first unveiled at the Qatar Motor Show in 2011, has now been confirmed for an initial production run of 250 examples.

Pioneering construction techniques, an advanced plug-in hybrid drivetrain and innovative packaging all play a part in allowing the XL1 to return 313 mpg on the combined cycle while emitting 24 g/km of CO2 to set a new benchmark for vehicle efficiency.

Powering the XL1 is a compact 800 cc TDI two-cylinder common rail diesel engine developing 48 PS. It’s linked to an electric motor producing 27 PS, resulting in a total of 75 PS – a modest output yet more than enough when the low kerb weight (795 kg) of the vehicle is taken into account.

The TDI engine is linked to an electric motor and a seven-speed DSG gearbox with an automatic clutch mounted between each unit. The electric motor can either work independently of the TDI engine or in tandem when accelerating. Accelerating from rest to 62 mph can be achieved in 11.9 seconds; the electronically limited top speed is 99 mph. Thanks to its plug-in hybrid system, the two-seater can cover a distance of up to 50 km in all-electric mode and therefore with zero local emissions.

In both its styling and packaging the XL1 draws on lessons learned from the 1-Litre car (2002) and the L1 concept (2009). The XL1 has evolved to feature staggered seating with the driver and passenger placed next to each other in a body structure made from advanced new materials providing immense strength yet weighing just 230 kg.

To make such weight savings possible, and yet viable for series production, Volkswagen developed and patented a new system for the manufacture of the Carbon Fibre Reinforced Polymer (CFRP) parts on the car called the Resin Transfer Moulding (RTM) process.

In total the XL1 weighs 795 kg. In addition to the body structure, the weight is accounted for by the drivetrain (227 kg), the running gear (153 kg), the interior including a pair of bucket seats (80 kg) and the electrical system (105 kg). In total just 23.2 per cent of the car (184 kg) is made out of either steel or iron.

Further savings are made through the extensive use of lightweight materials including magnesium (wheels), ceramics (brake discs) and aluminium (dampers, steering system, brake calipers).

The styling of the XL1 is borne out of functional requirements – easy access to the interior is granted via a pair of elegant scissor doors that hinge on the A-pillar while the profile of the car has been honed in the wind tunnel, the result being a remarkable coefficient of drag figure of 0.186. The XL1’s overall length (3,970 mm) and width (1,682 mm) are similar to those of a Volkswagen Polo yet its height (1,184 mm) is more akin to that of a sports car.

The XL1 will be produced at Volkswagen’s Osnabrück factory in Germany.

Article source: www.volkswagwen.co.uk