Retail Front

"It's Freezing Outside, Let's Put the Car's Convertible Top Down!"

Wind My hometown of Royal Oak, MI, once was dull. An outsider had said it skewed towards beat-up pickups and hardware stores.

Main Street had bars that smelled funny and a gun shop with creaky wooden floorboards; a place so old, you might have expected a close-out sale on muskets.

Then the in-crowd moved in, converting Royal Oak into what the state of Michigan’s economic development people officially call – no joke – a “cool city.” (Photo: Wind tunnel test shows how AIRCAP works on Mercedes-Benz E-Class Cabriolet)

We now have lots of nice restaurants, loft living quarters, upscale bars and entertainment venues. And, of course, a lot of cool people. Many of them drive around in cool vehicles.

I remember one car that literally was cool. Here’s why: No matter how cold it was outside – and Michigan winters can get Arctic-like – a guy in a white Saleen Ford Mustang convertible would tool around town with the top down.

During the deep-freeze season, he’d make the open-air motoring scene bundled up in a heavy coat, scarf and wool hat. He looked like a human Popsicle.

I’d chuckle at seeing that oddity as I looked out the window, sipped my latte and enjoyed the cozy fire in the fireplace at the trendy Caribou coffeehouse. (If you can’t beat ’em, join ’em.)

But owners of the ’11 Mercedes-Benz E-Class Cabriolet, who opt to drive around with the top down in the winter, may get the last laugh.

That’s because the 4-seater convertible is ingeniously designed to block out the cold, even when the top is down and the temperature below freezing. Credit for that goes to a new Mercedes system called AIRCAP. It creates a pressurized pocket of air that keeps the Cabriolet interior warm in the winter and cool in the summer.

It works like this: A wind deflector above the windshield directs outside airflow over the heads of the occupants. Meanwhile a mesh screen in the deflector slightly increases air pressure inside the car to keep the cold air out.

Working in tandem with that front-end stuff, a deflector screen behind the rear seats prevents backflow into the car.

So, if you activate AIRCAP and raise the car windows, you enjoy a comfortable hemmed-in cabin temperature that is in marked contrast to uncomfortable outside temperatures lurking above.

If you really want to stay toasty with the top down in frigid weather, the Mercedes convertible comes with an option called AIRSCARF. It consists of air vents integrated into the head-rest vicinity of the front seats.

The vents blow warm air on an occupant’s neck, a part of the body that is sensitive to temperature because a major artery is located there. Blood passing through the carotid artery is warmed and distributed to the rest of the body. Those Mercedes engineers think of just about everything. It took them a couple of decades to perfect this amazing climate-control system.

I tested AIRCAP and AIRSCARF on a chilly Smokey Mountain morn while driving in Tennessee and North Carolina. It worked great.

My auto journalist driving partner, Al Vinikour, and I may have looked like idiots deserving of mountain-folk guffaws as we drove with the top down in nippy weather. The locals had no way of knowing how comfty we kept in our warm air bubble.

To Al’s chagrin, I did an impromptu test of another new feature in the E-Class Cabriolet. You can raise and lower the top, even when the car is in motion. That will work at up to 25 mph.

So as we pulled into Asheville, NC – a once-sleepy town that, like Royal Oak, has become hip – I pushed the raise-top button as Al drove. Oops.

I guess I should have warned him first, because it shocked him to be driving while the top suddenly started closing in on us. OK, he didn't expect it. But from Al’s reaction, you would have thought an eagle swooped down and planted its talons in his head.

After he fussed, cussed and missed a turn due to the roof incident, we got our bearings and arrived for lunch at Cucina 24, a trendy restaurant. It reminded me a lot of home.

Discuss this Blog Entry 5

on May 7, 2017

A wind deflector is more than a quintessential accessory for any roadster! Not every roadster is fortunate as a Merc to get an AirCap to ward off the bogeys of wind noise and buffeting. I have mounted a good wind deflector named Zefferus wind deflector on my ride and it’s doing a great job of keeping my noggin from getting whacked by the gust!

on Jun 5, 2017

You are absolutely right about that. An additional wind deflector is inevitable for any roadster except for super-premium ones like the Mercs and Bimmers. I have something called a Backblade windscreen affixed on my ride, and it does its job well.

on Jul 17, 2017

The Backblade wind restrictor is also my choice of draught-stop. A good wind deflector is quintessential to rein in the bogeys of wind noise and turbulence. Had I not mounted the wind blocker I might have even gotten rid of my Vert.

on Jun 30, 2017

Yep that’s correct, if it’s a roadster it has to have a good wind deflector mounted to ward off the vices of wind buffeting and noise. Thanks to the Windblox wind deflector the cabin is quiet and turbulence-free.

on Oct 12, 2017

The Windblox wind deflector is indeed the accessory that I have mounted on my ride too. Now the cabin is super-quiet even on motorways. Wish I knew about this accessory when I bought the ride.

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What's Retail Front?

Blogs about automotive retailing, commenting on news impacting the business of selling vehicles.


Steve Finlay

Steve Finlay is the editor of WardsAuto Dealer Business magazine and a senior editor for His journalism career started 42 years ago as a crime reporter. A Michigan native, he likes...

Jim Ziegler

Jim Ziegler, president of Ziegler Supersystems, is a trainer, commentator and public speaker on dealership issues.
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