Tesla is hiking prices as it adds autopilot as standard on most of its cars.

It’s also making it harder for customers to buy its cheapest model. The company did not provide any specific reason for the changes announced on Friday, but it endured a tough 2018 after months of manufacturing hangups and delays in rolling out its best-selling Model 3.

Last week it reported a 31% fall in deliveries in the first three months of 2019 compared to the previous quarter, the single largest drop ever.

Even with the price hikes, drivers may actually be getting a better deal than before. Its Model 3 Standard Plus previously cost $37,500, plus $3,000 for autopilot. It will now sell for $39,500 including the assisted driving function.

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