Before the Mercedes SLS AMG came out and wowed us with its awesome gullwing design, a lot of people had little idea that the German automaker played with that design in the past and, while some saw the light of the production block, others weren’t as lucky.

One such design, considered today as the ‘Forgotten Gullwing’, is the Mercedes C111, a car that was universally lauded back in the day for its revolutionary Wankel diesel engine. Despite the number of prototypes that were made, the C111 never became a production model and soon thereafter, it was lost in the yard of discarded concept models, never to be heard from again.

That is until Arturo Alonso, the owner of GWA Tuning, decided to bring its spirit back. Feeling that a concept so iconic should be given its just due, Alonso and his team at GWA Tuning went out and took design elements from the C111 and incorporated modern changes into it to create a one-off machinery they appropriately called the “Ciento Once”.

Details after the jump.

  • 2011 Mercedes Ciento Once by GWA Tuning
  • Year:
  • Make:
  • Model:
  • Engine:
    M120 Mercedes V12 engine
  • Transmission:
    six-speed Cima H-type transaxle
  • Horsepower @ RPM:
    408 horsepower
  • car segment:

Exterior and Interior

2011 Mercedes Ciento Once by GWA Tuning High Resolution Exterior
- image 388129

The Ciento Once will come with a body made out of high-grade aluminum and an electrically operated rear adjustable wing. Other elements that will be added to this one-off vehicle include a swooping front hood, front spoiler with large air intake, a rear diffusor, and of course, those gull wing doors.

Comparing it to the 1970 Mercedes-Benz C111 from which it was based on, the Ciento Once will come with a slightly shorter wheelbase at 103 inches while maintaining the same weight – around 1,400 kg – as its inspiration. The one-off car also runs on GWA Type A wheels, 19X9 front and 20X11 rears, with 265/35/19 and 295/30/20 rubber.

As for the interior, GWA Tuning gave the Ciento Once a modern take while also taking into account a vintage retro feel. Modern items include carbon fiber seats covered in plaid, an instrument panel that’s been modeled after a W120R MB, modern dashboard accents, illuminated door sills, and brushed AMG aluminum pedals.


2011 Mercedes Ciento Once by GWA Tuning High Resolution Exterior
- image 388132

GWA Tuning certainly made sure to give the Ciento Once an engine worthy of its one-off status. Housed in a tubular space frame chassis, the car’s power plant is derived from a M120 Mercedes V12 engine that produces a robust 408 horsepower and is mated to a six-speed Cima H-type transaxle and a special tuned exhaust. Even better, the car’s powerful engine can be seen through a glass on the rear deck, making for some nice ‘ooohing’ and ‘aaahing’ from passersby.


No word yet on how much it’s going to cost, but considering it’s most likely going to be a one-off vehicle, there’s a very big chance that it’s going to come with a steep price tag. How steep? Well, we wouldn’t be surprised if it punches a number north of six digits.

2011 Mercedes Ciento Once by GWA Tuning High Resolution Exterior
- image 388134


Scoff if you want, but if you’re in the market for a one-of-a-kind Mercedes with gullwing doors to rival your neighbor’s SLS AMG, then GWA Tuning’s Ciento Once is the perfect candidate for that. Just make sure you call ‘dibs’ on the car before everybody else.

Source: GWA Tuning

What do you think?
Show Comments


  (399) posted on 06.24.2011

hmm. Its not about the weight anymore but this car is kind of less powerful for a v12 technology. BTw, the look of the car seems to have a odd design in its front. I think the original concept would be much better compare to this car.

  (434) posted on 06.24.2011

hmm. The gull wing of this car makes it more gorgeous! Although I have a doubt that this car would be less powerful due to its heavy door that adds to the weight of the car. I want a lighter version of this car.

  (383) posted on 03.28.2011

They haven’t make this concept look better. I think, if you are going to remove the gullwings, nothing is good anymore on this ca. The whole exterior messed up including the front and the back lights!

  (377) posted on 03.11.2011

I like the updated version on the wheels. Apparently CTS-V grilles available at low cost for high mark up.

  (762) posted on 01.23.2011

Looks great and amazing,It is totally incredible creations.If you want to be an extraordinary and awesome which will surely proud of..?make sure you choice the best for it!

  (347) posted on 01.10.2011

but enthusiasts will appreciate this is a spectacular classic-icon revival that’s easily on par with the the new Lancia Stratos.

  (321) posted on 01.10.2011

Well the Bricklin SV-1 came first and yes I would have to agree, it seems to share a great deal in common with the Bricklin (sadly that Canadian marvel never sold).

  (444) posted on 01.9.2011

They also made a diesel version of the C111 which ran for twenty four hours straight. Demonstrates that a performance diesel isn’t an entirely new concept.

  (692) posted on 01.6.2011

The C111 was an empiric vehicle by Mercedes-Benz that united a four-rotor Wankel engine. It never fathered it to production although Mercedes did survey with successor concepts

  (777) posted on 01.6.2011

The San Antonio, Texas-based tuner, had by designer Arturo Alonso, willed to vivify the 1970 C111 to originated another gullwing Merc.

  (89) posted on 01.6.2011

At least if it looks like this, does it have a cool engine?

  (101) posted on 01.6.2011

I cannot believe they considered this for current market smiley

  (39) posted on 01.6.2011

Are you kidding? You want to sell this? lool

  (51) posted on 01.6.2011

I think Mercedes had plans for a Ferrari competitor since then... lately the shapes of sport cars got much more diversified and we have the current market as you know it.

  (151) posted on 01.6.2011

I hope this is a joke!

It looks like Lotus HOOKED up with Ferrari and they put the Mercedes badge on it! smiley

Crappy looks! smiley

  (409) posted on 01.5.2011

Agree this is something new from mercedes benz, i guess they have the same wheelbase as the SLS AMG. but honestly, I like it more than the SLS.

  (453) posted on 01.5.2011

wow this is a whole lot different from the other Mercedes Benz design. well I guess they wanted to revamp their sports car. I love the rims and the rear end of this baby.

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