Fabricados en Argentina

The tubular chassis is identical to that of the Super América.

The front and rear suspension use triangular wishbones and transverse leaf springs but these are apparently not very well engineered.

Front brakes are inboard discs while rear are drums.  The front hubs are of low quality and many people replace them with components from other makes of car and the braking system itself suffers from various shortcomings.

Another peculiarity is the replacement of the 2CV's ignition system with an electronic one with an in-built anti-theft device - a card has to be inserted into the dash-mounted ignition before the engine will start. 

Gringa van above

Another variant is the Gringo which was made in front wheel drive and 4 x 4 versions.

The IES story began in either 1982 or 1983 with the company building the IES 3CV which was all but identical to the equivalent Citroën 2CV 6. 
Over the years, a number of detail changes were made - the electronic ignition and burglar alarm were introduced and the car was renamed IES América and then, with a change of chassis and suspension, bonnet lights, etc. the model was named IES 3CV América.  The lights came from the Renault R6.
Another model was the Safari which was based on the Méhari and retained the Méhari's chassis and suspension in the front wheel drive versions but used an adapted tubular chassis for the 4 x 4 version.
A new 800cm3 water-cooled engine was under development by Berta, an Argentinian vehicle developer of great repute but IES went out of business and the owner, Eduardo Sal-Lari was apparently jailed for fraud in 1990 before the new engine could be put into production.