The Mercedes GLS has an impressively punchy and smooth diesel engine, and its smart interior will comfortably accommodate seven occupants, but the build quality and ride comfort disappoint for a luxury SUV of this price. The 450d makes the most sense in AMG Line Premium Plus trim.
This is the high performance version of the GLS, with a 4.0-litre V8 petrol engine under the bonnet. Producing 603bhp and 624lb ft of torque, this takes 4.2sec to sprint from 0-62mph. Top speed is 155mph.
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