Not too sure how this works ,being a new member,but having owned four 123/124's in last 20 years....my latest one , E320 1994 in my possession for 3 faultless years, has developed a judder....similar to the sensation of poor wheel balance....when engine warm and under moderate torque for acceleration in any gear. I've checked the transmission fluid when warm and it's clean and to correct level. It runs as normal when not being asked to pull ie unlaboured cruise and exhibits no problem till at working temp. I do hope someone from this vast wealth of members experience can advise me of the possible cause. Many thanks.