Interactive Driving System (IDS)
New, standard Astra TwinTop chassis with further developed McPherson wishbone axle with suspension subframe in front. A patented Torsion Beam concept with a U-form double-wall profile is used in the rear.

Magnetarc Welding Technique
Patented method used to connect the axle and trailing arm of the Astra TwinTop Torsion Beam Rear Axle. The welding technique enables the use of various wall thicknesses for the torsion profile (stabilising the effect of side roll) and various angles in the profile cross section to control the self-steering effect.

McPherson Front Axle
The IDS chassis system of the new Astra TwinTop includes an enhanced McPherson wishbone front axle. The McPherson principle has a coil spring encircling the shock-absorber, allowing space-saving wheel control with low unsprung mass. The Astra TwinTop's front axle is attached to the underbody by a subframe manufactured using Hydroforming.

Mobile Phone Console
Universal console including hands-free kit with telephone-specific adapter (available for most mobile phones), which connects the phone to the new Astra TwinTop's infotainment system. The phone can be controlled via the Steering Wheel Remote Control. Menu navigation and status display are shown on the Graphic Info Display. Wireless Bluetooth interface and voice control are standard.
 
MP3 Player
MP3 stands for "Motion Pictures Experts Group Audio Layer 3", a process which permits the compressed storage of audio data without negatively affecting the sound. Thanks to the high level of compression, a full ten hours of music instead of the usual 70 minutes can fit onto a CD-ROM.

Park Pilot
This parking aid employs ultrasonic sensors located in the Astra TwinTop's bumpers to alert the driver with an audible warning signal if there is an object in the car's path. The sensors send out and receive sound waves, calculate the distance to the object and then emit an acoustic warning signal if clearance falls below a predetermined distance. The system also automatically allows for a trailer should a towbar be mounted to the car.

Sport Switch
With the aid of the Sport Switch button in the centre console, the Astra TwinTop's driving characteristics can be changed at the flick of a switch. If the Sport mode is selected, accelerator pedal and steering response is more direct. The Sport Switch also enables the driver to deactivate ESPPlus, if fitted.

Thorax-Pelvis Side Airbags
Installed in the backs of the front seats, these voluminous and form-optimized side airbags with two air chambers protect both the upper body and the pelvic area.

Torsion Beam Rear Axle
Rear axle construction of Astra TwinTop's chassis was tuned to suit the requirements of the bodyshell. Twist-beam axles have minimal space requirements, low weight and a high camber thrust rate.

TWINPORT
Intelligent fuel-saving technology from Vauxhall for four-valve petrol engines with displacements of up to 1.6 litres. It employs variable intake control via a throttle valve in one of the two intake ports for each cylinder and uses high rates of exhaust gas recirculation to reduce fuel consumption by as much as 10 percent under everyday driving conditions. While at partial load up to 25 percent of the cylinder charge is made up of previously burnt exhaust gas which is delivered through an additional line, power generation and fuel efficiency are completely retained at full load, and can even be improved.

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