Currently re-doing cooling system, replacing water pump and was wondering if any of the pulleys , as well as the water pump need any lubrication, grease etc.? I saw in a MB parts catalog that the 3 hole water pumps came in maintenance and maintenance-free versions, while the (4) hole, including mine had only one option. I'm guessing that the later (4) hole ones were maintenance-free going forward. But, while I have the belts off and radiator removed, I would better check with you guys if there is any particular lubrication recommended. Thanks. Mark.
