Apparently they are the older versions and have not got the same engines

He's been out in a 420 d and it was dog slow, I mean really dog slow, he pulled out of a junction on the test drive and he floored it expecting a bit if a kick and nearly got taken out by a truck he thought he was going to have no trouble with

The ml420 was doing 35 mph at that point
His cayenne was doing 60 mph at the same point
And these newer 350 d mercs tend to get a proper shift on but he's never been able to test one on a GL lol

My mates got one in an e class estate and its deceptively fast