To recall, Mercedes-Benz spun out the EQ brand to denote its fully-electric line-up in 2016. Despite rolling out a family of vehicles such as the EQA, EQB, EQC, EQE, and EQS, the take up of its EVs have been generally slow and wrought with issues. That led to the automaker’s decision to drop the EQ badge altogether starting with the all-new CLA which will be clunkily called “CLA with EQ Technology” instead (the all-electric G-Class also got the same designation).

The CLA with EQ Technology comes with two powertrain options initially—the CLA 250+ with EQ Technology and the CLA 350 4Matic with EQ Technology. The former offers up to 792 kilometers in range, while the latter’s dual motor output delivers 353 horsepower (260 kW) of grunt.

Impressive as the CLA is, it comes with a glaring issue that only came to light AFTER it was launched.

Mercedes touts the CLA with EQ Technology’s fast charging capability—thanks largely to an 800-volt system—it turns out it’s not compatible with a lot of DC fast chargers available globally. The reason? The lack of a DC-to-DC voltage booster—something you’ll find in other 800-volt EVs—for, you guessed it, cost reasons. This means that fast charging the CLA would only be possible using an 800-volt DC charger. The more common 400-volt DC fast charger, will not work.

At first, Mercedes defended the move citing that the number of 800-volt DC fast charging stations is constantly growing in Europe. That’s well and good in first-world countries, but in areas where EV adoption is still at an infancy, this poses a problem. It’s exacerbated by the fact that Mercedes decided to equip U.S. market CLAs with Tesla’s NACS connector only to realize that Tesla’s superchargers only work at 400 volts.

Realizing the sheer stupidity of what they’ve done, Mercedes-Benz says they’re rushing to solve the all-electric CLA’s charging issue by working on a built-in converter that makes its compatible with a 400-volt network; something they should have done in the first place. That’s great, but so far, Mercedes has confirmed this fix for the U.S. market. It’s also unclear if this converter will be made available as a retrofit to the first batch of units which start shipping to customers in a few months.