2mm scratch on Mercedes EQS triggers €50k battery replacement

The 2 mm scratch that turns a €150,000 Mercedes EQS into an impounded car

The owner of a €150,000 Mercedes EQS took the car to an official workshop after scraping the underbody. A scratch just over two millimeters deep on the plate protecting the battery. According to reports circulating online, he received a quote of €50,000 for a new pack, a refusal to return the unrepaired vehicle, and insurance advice telling him to handle it himself. The warranty, which he believed covered this, reportedly offers no protection. The matter has ended up in court.

For anyone who has replaced a cheap metal sump guard, this figure sounds like a bad joke. However, the cost corresponds to a battery architecture integrated into the vehicle structure. For the buyer, it is the uncomfortable realization that the electric car isn't truly theirs, even if they paid for it.

Protocol turns a scrape into total failure

The threshold isn't set by local mechanics but by manufacturers: after any impact in the battery zone, inspection and measurement are mandatory. If the marked depth is exceeded, the entire assembly must be replaced. In this case, the limit is two millimeters. A poorly marked estimulante ilegal bump, a garage ramp, or a stone on a secondary road can cause this damage.

Some argue that scratching isn't even necessary. A rear-end collision at a traffic light, typically resolved with an amicable accident report, could trigger the same protocol in several models because specific electrical components require battery replacement per manufacturer instructions. The aluminum sarcophagus shows no mercy.

The argument presented is safety: a damaged cell can lead to fire, and no one wants to sign off on such risks. In online discussions, mechanical common sense suggests that a deformable layer of one or two centimeters and separating the battery five millimeters from the bottom would allow the protector to absorb the impact. On paper, it's cheap. In practice, no one does it.

Impounded car and unread contracts

The owner entered the workshop trusting the warranty and left with his car effectively seized within the facility. It is argued that the vehicle does not meet brand safety protocols, that the contract supports this stance, and that immobilization is permitted. There is no refund. Connected cars can be remotely disabled: ownership comes with usage conditions few read before signing.

This aspect disturbs more than the bill. If the manufacturer decides your car is unsafe, it stops running. The lingering question is whether a brand can declare a vehicle unsafe due to a two-millimeter mark on a protective plate.

From €24,000 to €80,000: batteries aren't repaired

The numbers become grotesque when compared. Replacing a Nissan Leaf battery costs €24,000 for a car that originally cost €30,000: the part alone consumes 80% of the vehicle's value. Toyota is cited as the only brand developing reuse systems to moderate prices.

The scale jump occurred in China, where replacing a Polestar 2 battery (new price €50,000) was quoted at €80,000 after a rear-end collision. Changing the part costs more than buying a whole new car.

A detail explains part of the mess: the legal obligation to recycle used packs. Some claim manufacturers inflated prices to avoid waste management. Emerging policies are even more cynical: we replace the battery, but you take the old one to recycle.

Structural battery: the part is the whole car

In models with structural batteries, cells are embedded in the chassis, including tunnels and rails, so replacement requires dismantling half the car. Labor costs skyrocket above the vehicle's value: a scratch equals a new car. Volvo, using this scheme, is the most repeated example.

The problem shifts from price to design. Each manufacturer has unique formats, modules, and connectors with no common parts across brands. Consequently, battery repair is de facto impossible.

Why not replace only damaged cells?

Because batteries are designed as single units, and diagnostics don't consider modules. The clearest example isn't a car: opening a vacuum cleaner battery to replace faulty cells costs over €90 in parts versus less than €10 for the failing cells themselves.

In automotive, this issue multiplies. A modular architecture with electronic control per module would identify degraded cell groups and replace only those. This would extend pack life and lower bills. No one offers this.

Sales targets stall

Anfac's Electromobility Barometer targeted 190,000 electrified vehicles by end of 2023. By March, figures were 25,450, only 13.4% of predictions. Manufacturers claiming full production commitment show no growth capable of sustaining promised rates.

Discussions cite second-generation biofuels and e-fuels compatible with current fleets, and hydrogen, whose main objection arises in enclosed spaces. Others suggest limiting batteries to motorcycles and scooters due to weight-performance ratios.

What remains unresolved is why a two-millimeter scratch equals a full pack. Design, safety protocols, and commercial interests are intertwined. The debate stays there: between avoidable defects and the physics of a technology that doesn't yet know how to repair itself.