I've got an E220 CDI Mercedes-Benz estate on a 2004 plate with 107,000 miles. I've noticed a juddering up steep hills under load, like a petrol engine misfiring. A Mercedes-Benz specialist has advised that it's the torque converter and that models from this time had a 'cheaper' torque converter fitted, which is now failing and needs replacing. He also said that it could be glycol and water passing into the transmission fluid through the cooler, which is in the radiator. I've contacted Mercedes-Benz who are "very sorry" but not willing to contribute. Do you have any knowledge of this problem?