What matters when the kilometres pile up
At 15,000 km a year, the list price dominates the calculation. At 40,000 km, it becomes secondary. What weighs is how often the car goes to the workshop, what exactly each service contains, and the annual tax of the region of registration.
Four brands are compared here, on the models whose Belgian list price was recorded on 1 August 2026 on Moniteur Automobile and re-checked on 2 August 2026.
BMW — the shortest servicing line
The Service Inclusive package applied to the i5 and iX3 contains no engine oil, no spark plugs and no fuel filter. Those are exactly the three items that come back at every service on a combustion car, and the ones whose frequency rises with mileage.
BMW i5: from €74,100, range €74,100 to €109,850. BMW iX3: from €61,950, range €61,950 to €69,900 — the tightest in our whole tracking set.
Audi — the only documented value retention
The A6 Sportback e-tron, from €65,300, is the Autovista 2025 winner among electric cars excluding SUVs. For a high-mileage driver selling a high-odometer car, it is the only one of the four brands whose value retention rests on a published award rather than on reputation.
Warranty 5 years or 120,000 km, battery 8 years or 160,000 km: the mileage cover matches the use.
Volvo — the large format
The EX90, from €84,490, is the largest body in our tracking set, with a Brussels road tax recorded at €92.93 a year. The Service Plan Plus covers wear parts — an item that matters as the kilometres add up — but it must be taken out within three months of delivery.
Mercedes-Benz — the best retention, the worst regime
The Classe E, from €61,468, is the Autovista 2025 winner among large saloons. It is the best value retention observed in our tracking set, across all powertrains.
And yet: ordered by a company in 2026, it is 0% deductible. As a petrol estate, its Brussels road tax is recorded at €931.66 a year, against €92.93 for an electric car in the same set.
The summary
| Model | From | Recorded annual tax | 2026 deductibility |
|---|---|---|---|
| BMW iX3 | €61,950 | Lowest brackets | 100% |
| Mercedes-Benz Classe E | €61,468 | €931.66 in Brussels (petrol estate) | 0% |
| Audi A6 Sportback e-tron | €65,300 | Lowest brackets | 100% |
| BMW i5 | €74,100 | Lowest brackets | 100% |
| Volvo EX90 | €84,490 | €92.93 in Brussels | 100% |
The full ranking adds three models to this list, and the comparison tool puts them side by side line by line.
Sources
- Moniteur Automobile, new car prices in Belgium, recorded 1 August 2026, re-checked 2 August 2026.
- Autovista 2025 residual value awards.
- Moniteur Automobile, “Déductibilité fiscale : règles en 2026”, published 1 April 2026.
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Frequently asked questions
Renaud a passé neuf ans comme gestionnaire de parc chez un loueur longue durée belge, du côté où l'on calcule la valeur résiduelle d'une berline allemande à 48 mois avant même de la commander. Il a quitté le métier en 2020 et écrit depuis sur le haut de gamme, depuis Namur.
