Mercedes-Benz Gl 350 Bluetec

Thoroughly inspect the AdBlue system and check for warning lights.

Verify the condition and service history of the air suspension.

Listen for any unusual noises from the turbocharger during a test drive.

Check for complete service records, especially for diesel-specific maintenance.

Consider the cost of potential repairs when budgeting for ownership.

If buying from the US, factor in shipping, customs duties, and homologation costs.

Test all electronic features, including infotainment, climate control, and driver aids.