The BMW 5 Series and Mercedes E-Class have long been executive saloon rivals, competing for dominance in luxury, technology, and driving dynamics. Both models have evolved with the times, and their latest plug-in hybrid (PHEV) versions—the BMW 530e and the Mercedes E300e—showcase how traditional executive cars are adapting to the shift towards electrification​.
With their 2.0-litre turbocharged petrol engines, integrated electric motors, and more than 60 miles of electric range, they promise lower running costs, company car tax advantages, and strong performance. But how do they compare in the real world?
Both the BMW 530e and Mercedes E300e follow a similar PHEV formula—a four-cylinder petrol engine combined with an electric motor and a battery pack to offer a balance of performance and efficiency.
A key advantage for the BMW is its smarter energy management system. It strategically uses electric power over long journeys, reserving battery power for city driving and stop-start traffic. In contrast, the Mercedes tends to deplete its battery early in a journey, making it less efficient in mixed driving scenarios​.
Despite their combined power outputs exceeding 300bhp, neither the 530e nor the E300e feels outright sporty due to their weight and size. That said, both offer strong acceleration and responsive handling for executive saloons.
In terms of ride quality, the Mercedes is the more comfortable car. It absorbs bumps and road imperfections better, while the BMW’s passive M Sport suspension feels firmer, particularly at motorway speeds. If comfort is a priority, the E-Class has the edge, but for a more engaging drive, the 5 Series wins​.
The BMW and Mercedes offer two different approaches to in-car technology—both packed with large infotainment screens, digital driver displays, and advanced driver assistance features. However, their execution varies significantly.
Build quality is another key differentiator:
One major downside for both cars is interior space. Despite their large exterior dimensions, neither offers exceptional rear legroom, and passengers over six feet may find the back seat tight. However, the BMW has a slightly better boot capacity, as the E300e loses 170 litres of space due to its battery placement​.
The BMW 530e and Mercedes E300e both excel in plug-in hybrid technology, making them attractive executive cars for those seeking lower tax and fuel costs. However, they cater to slightly different buyer priorities.
Buy the BMW 530e if:
Buy the Mercedes E300e if:
Ultimately, while the BMW is the sharper driver’s car, the Mercedes offers a more luxurious experience. If your focus is on performance, go for the 5 Series; if you want maximum comfort, the E-Class is the better choice
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We work with the majority of automotive brands in the UK, giving you access to the latest models and exclusive deals.
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