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Here's how Cadillac made its Magnetic Ride Control suspension quicker and smarter

Bugatti makes the world's fastest car, but Cadillac claims it has developed the world's fastest suspension. Its fourth-generation Magnetic Ride Control technology receives hardware and software tweaks to deliver a more comfortable ride and sharper handling. It's offered on some variants of the CT4, CT5 and the Escalade. Introduced in 2002 on the Seville STS, this self-adjusting suspension is not as complicated as it might sound. It relies primarily on electromagnets that emit a magnetic field, and a magnetorheological fluid whose viscosity changes depending on the strength of the magnetic force. Sensors scan the road up to 1,000 times per second and send the information they gather to the electromagnets, which then alter their magnetic field as needed to modify the fluid's viscosity. The fluid is in the shocks, so making it thicker returns a firmer ride, and vice versa. In simpler terms, Magnetic Ride Control leverages chemistry and physics to make the ride sporty, comfortable, or somewhere in between -- all in the blink of an eye. By reacting to the changing magnetic field, the fluid-filled shocks filter out road imperfections and maximize tire contact with the road to deliver more precise handling. Cadillac began developing the fourth-generation system by improving the hardware. The in-wheel accelerometers are more accurate than before, the inertial measurement unit is more precise, and the damper fluid formula was changed for quicker response times and a smoother ride. Engineers then turned their attention to the system's software. They notably gave the sensors the ability to process a wider selection of input and output signals, which translates to a wider spread between comfort and sport. And, they made the response time up to 45-percent quicker. All told, the fourth-generation Magnetic Ride Control technology performs better under heavy braking and hard cornering, it delivers more consistent performance, and it reads the road more accurately. Cadillac proudly notes these are the most comprehensive updates it has made to the system in nearly two decades. Magnetic Ride Control comes standard on the 2021 CT4-V and the 2021 CT5-V, and it's bundled into the CT5's V Performance package, which also includes a mechanical limited-slip differential. It's also standard on the Sport and Platinum variants of the 2021 Escalade, and it's part of the Premium Luxury trim's Performance package.

Why does this Cadillac fob seem to be for a mid-engine roadster?

Is GM bringing back its Caddied-up Corvette sibling, the Cadillac XLR — only this time based on the mid-engine Corvette? That's the question posed by photos of a wedge-shaped Cadillac key fob someone provided to The Drive. The buttons show a trunk — and also a frunk. So, mid-engine, unless the fob goes with an EV that has its motors and other electrical bits scattered to the wheels and elsewhere. Also, there's a button to operate a droptop. And the car profile on the fob is Corvette-like. All of which makes for some pretty great speculation. Except that Cadillac's way back from the failures of its sedan-centric lineup was thought to be through SUVs such as the new XT4 compact crossover, the XT5 and the somewhere-in-testing three-row XT6. Plus, the XLR, which was produced between 2003 and 2009, hit its sales peak in 2005 of just 3,730 cars, or about one-tenth the sales volume of the Corvette. So it's hard to imagine there's a vast untapped market out there for the luxury roadster — plus the XLR's demographic of well-to-do grandpas is dying off, or at least thinks it is. So a resurrected XLR would seem to be an unlikely savior. A lot's happening with GM's luxury brand — the debut of the XT4 at long last, a new boss, a thinning of the sedan herd but expansion of the V's, a backtrack to Detroit after its New York sojourn, the cash-cow Escalade under direct assault from the fine new Lincoln Navigator, and the impressive performance of its Super Cruise technology. But an XLR? So what is this fob's story? The Drive speculates it's a universal test fob and the buttons don't necessarily mean a thing, or that somebody stuck a Caddy emblem on it just to yank our chains. Who's to say. What would you like it to mean? Related Video:

GM recalling 2013 Buick LaCrosse, Cadillac SRX over transmission software

The National Highway Traffic Safety Administration has issued recalls for the 2013 Buick LaCrosse and 2013 Cadillac SRX due to a problem with the software for the transmission controller. On about 27,000 SRX and LaCrosse models, the transmission could accidentally be shifted to Sport mode, which would reduce the amount of engine braking drivers experience.
NHTSA says this could increase the risk of a crash, but, fortunately, the required fix is simply an update to the software.
While we're on the subject of General Motors vehicle recalls, a small number (48) of compressed natural gas versions of the 2011 Chevrolet Express are also being recalled for a potential risk of fire or explosion. Yikes. Both official recall notices are posted below.