AdBlue: with the engine running, check the dash for AdBlue and engine warnings, and check the AdBlue level. A scanner reads stored NOx sensor and dosing codes. Bad result: a warning, a stored code, or a van that refuses to start.
Recall campaigns: ask a Mercedes dealer to check open campaigns for the van's VIN, and ask for proof that recall work was done. Bad result: an open campaign.
Running costs
Operational
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Workshop
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Fixed costs (tax, insurance)
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Total per month
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New-car depreciation (not included)
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Market
Listings on mobile.de in this generation with this fuel, gearbox and power.