Porsche’s popular Cayenne SUV will receive a mid-life makeover, ahead fo the launch of smaller Macan sibling.The new Cayenne was spotted during winter testing in Germany. IMAGE GALLERY: 2014 Porsche Cayenne (Spy)The entire range will be refreshed with a minor facelift. Spy photographers captured images of the standard, GTS, Turbo and new plug-in hybrid variants.The Cayenne will receive a new front more akin to the 2014 Panamera. It's rumoured the SUV will use some of the new engines introduced on the Panamera including the 3.0-litre twin-turbo V6. The Plug-In E-Hybrid model will makes its debut later in 2014 to go on sale in 2015.