SPY PICS: PARIS MOTOR SHOW: Two GT Roadsters tipped

The Paris motor show is expected to literally lift the lid on two Mercedes-AMG GT drop-tops that we should see in Australia in 2017.

The entry-level GT Roadster will break cover in Paris and so will the wild new GT C cloth-top. These spy shots capture the Roadster testing on public roads, with the cloth roof clearly visible in the rear view.

And potentially offering a pointer to further expansion of the GT sports car range is the Mercedes-Benz EV concept that will star in Paris, as it is expected to offer some sort of styling hint to the four-door GT 4 that AMG has planned for launch before the end of the decade.

Currently in Australia, only the $294,610 GT S coupe – rated at 375kW/650Nm – is on sale. In December, the range is confirmed to begin its expansion with the entry-level GT coupe, which is powered by a slightly detuned 340kW/640Nm version of the 4.0-litre twin turbo V8 engine.

Pricing is expected to drop down into the $265,000 to $270,000 range.

The GT roadster is anticipated to arrive mid-2017, around the same time as the super-hot 430kW/700Nm GT R, which was unveiled with great fanfare at the Goodwood Festival of Speed. Less than 30 examples of the GT R are expected to make it on sale in Australia.

The GT C Roadster was previewed on a recently leaked Mercedes-Benz road map of future models, with a 2017 launch date planned. In terms of engine outputs and chassis dynamics it is expected to sit between the GT S and the GT R.

There is no confirmed arrival date for the GT C Roadster in Australia but it seems certain for these shores, given the hunger for all things AMG here.

An equivalently specified Coupe that may or may not bear the GT C name is also understood to be in the pipeline.

In the roughest styling terms, the GT C has been described by Benz insiders as a melding of the front-end from the GT S and the 57mm wider rear-end of the GT R.

How much of the GT R's new tech, including active aero, four-wheel steer, retuned suspension and engine will make it into the GT C is yet to be revealed.

However, all GT variants will get a steering update developed with the 'R' late this year, while the 'Panamericana' grille that debuted on the GT3 racer and also features on the 'R' will be a big part of a minor 2017 facelift.

This expansion of the GT line-up is totally in-line with Mercedes-AMG boss Tobias Moers' long-stated goal to develop a model range rivalling the Porsche 911.

Moers is already dropping hints of a GT Black Series as well as expanding the R (race) concept to other members of the AMG family.