The exterior updates give the convertible a tweaked front end and revised rear bumper.

Audi is planning a modest update for its TT coupe/roadster range, and our latest spy shots reveal some of the planned updates for the convertible version of the soft top sports car.

The German car maker's designers have a number of tweaks in store – up front, there's a new front spoiler where the corner intakes no longer connect to the narrow inlet that runs the vehicle's width. Revised headlights now have the LED strip running along the top, instead of the bottom like on the current model. The side sills look much thicker, too. The rear bumper appears to be largely the same, except for a more prominent simulated diffuser along the bottom. 

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The massive spotlights on the front of the roadster in our pictures won't be available from the factory on the actual model. Folks in rural areas would perhaps welcome the option for better night time visibility, though.

Earlier spy shots also reveal that there are updates in store for the more potent TT RS. Like the standard model, it is set to receive new parts on the front and rear end, but these pieces are much more aggressive. They include a revised rear diffuser, and a lower front spoiler with extra strakes underneath the nose for added style and aero efficiency.

The photos we've seen so far haven't yet given us a glimpse inside the TT's updated cabin. Infotainment system upgrades are likely, and expect revised materials inside the car too.

Powertrain changes for the updated model range also remain a mystery. Completely new engines are unlikely, but Audi might be able to massage higher outputs out of the current selection of motors. Depending on the model, front- or all-wheel drive will be available.

Gallery: 2018 Audi TT Roadster Spy Shots