The Mercedes-Benz EQS looks to redefine what we know of all-electric luxury sedans. It is laden with the latest tech, although it has been revealed that one of its features, the rear-wheel steering system, will be available on a subscription basis in some markets.

Buyers of the EQS in the U.S. will be pleased to know that it comes standard with a rear-wheel steering system that can turn the rear wheels by up to 10 degrees. However, in other markets, the rear-wheel steering is capped at 4.5 degrees. Auto Motor und Sport has discovered that, in Germany, the full 10 degrees can only be unlocked through an over-the-air update.

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All Mercedes-Benz EQS models leave the factory with all the hardware necessary to turn their rear wheels by up to 10 degrees, they just need the right software. Auto Motor und Sport reports that German customers can pay €489 ($571) per year to have the feature unlocked or put down €1,169 ($1,376) upfront to have the software for three years. Interestingly, the publication notes that the system also requires the 360-degree camera which itself is a €1,130 ($1,331) option.

Mercedes-Benz took off the covers to the EQS in April. The all-electric alternative to the likes of the S-Class is underpinned by a dedicated EV platform. It will initially be sold in the U.S. in EQS 450 and EQS 580 forms, the first of which has a single electric motor with 329 hp and 419 lb-ft (568 Nm) of torque while the latter is good for 516 hp and 630 lb-ft (854 Nm) thanks to two electric motors.