I have an S320 cdi 02 model with five speed tipfunction tranny - is this the 722.6?. I realise that these are not actually lifetime fill and want to change the fluid. Just wanted to find out how to discover if it has a torque converter drain plug or not before I pull all the plastic undertrays off. Oh and if it does have a drain plug, how difficult is it to rotate the diesel engine via the crank??!! Have already done the fluid change on a 98 SLK which wasn't too difficult. I suspect this will be more complicated and I really don't want to use the oil cooler line and two bucket method.