Vauxhall has added satellite navigation as standard across the Signum range.

Previously a £1,400 option, the system incorporates a four-disc CD auto changer, nine speaker stereo, and CD-ROM based voice guidance.

Other equipment changes to the Signum range include the addition of dark tinted glass to the rear passenger doors and tailgate, and an upgrade from 16 to 17 inch alloy wheels for the Signum Elegance.

Selected V6 models also benefit from a lower on the road price, in addition to standard satellite navigation. Signum Design 3.2 V6 petrol and the 3.0 CDTi V6 diesel are reduced in price by £1,150 and are now £20,965 and £23,715 on the road respectively. All other prices remain unchanged.