Tesla, SGL, Walmart, Cadillac.

Tesla triples safety: Following incidents of burning Model S’ last year, the Californian carmaker now outfits its vehicle bodies with a triple underbody shield. All Model S produced since 6th of March already have this feature. For all others, Tesla offers retrofitting upon request and free of charge. The NHTSA fully approved the measure and has closed its investigation.
chargedevs.com, medium.com (with videos), electriccarsreport.com

Cheaper carbon fibre: German carbon specialist SGL expects prices to fall by up to 90% within the next few years due to reduced manufacturing costs. This would mean 30 euros (41 dollars) or less per kilo and could make carbon fibre reinforced parts an even more viable alternative for cars.
reuters.com

Walmart shows the future in form of its aerodynamic hybrid truck. Its trailer is entirely made out of carbon fibre. The whole vehicle has now been presented at the Mid America Trucking Show (MATS) in Kentucky, USA.
hybridcars.com, greencarcongress.com (with video)

First-world problems: Cadillac is recalling 656 ELRs with range extender due to a fault with the electronic stability control. Fortunately, only 55 had actually been delivered to consumers while the rest is still at dealers or at the plant. According to GM, the problem does not affect any Volt vehicles.
autoblog.com, electriccarsreport.com