302-horsepower 3.5L V6 7-speed shiftable automatic AWD
36000 mi | Outer transfer case bearing was making a noise related to speed. Dealer ordered and replaced entire transmission. There is a service program for all 4-Matic Mercedes relating to this issue due to tolerance stacking. |
turbocharged 577hp 5.5L V8 7-speed shiftable automatic AWD
6000 mi | shifter became unresponsive after a few seconds of starting car. you'd have to select a gear quickly or you couldn't, nor could you select another. the only way to get back into park was by opening the door. trans needed a "software update" |
turbocharged 402hp 4.7L V8 7-speed shiftable automatic AWD
23000 mi | Rough downshifts from 5th to 4th. Reset adaptable trans module. Did not fix. |
26000 mi | Rough downshifts from 5th to 4th and sometimes 4th to 3rd. There was a code stored in the system and the dealer was instructed by MBUSA to teplace the torque converter, which they did. This fix was not successful. |
27000 mi | Transmission slipping on accelerating downshifts, rough decelerating downshifts from 5-4 and sometimes 4-3. |
42000 mi | Transmission slipping. |
turbocharged 195hp 2.1L I4 Diesel 7-speed shiftable automatic RWD
48000 mi | Second trip: Replaced the transmission control module. New torque converter installed. |
48000 mi | New transmission installed. Vehicle was returned today so too early to assess the fix. It was at the shop for roughly 10 days, but we were provided a loaner each time, so no problem. Fingers crossed. Dealership was very accommodating. |
302-horsepower 3.5L V6 7-speed shiftable automatic RWD
7000 mi | Jerks between 1st and 3rd gear and 4th to 5th gear. Have had this problem since I received the car. They have no solution for it except to reprogram it and that only lasts for about a month and then it goes back to old routine. Worst trans in any car I have ever owned. According to MBUSA they are aware of the problem but have no solution for it. |
302-horsepower 3.5L V6 7-speed shiftable automatic AWD
52000 mi | Clutch kit in transfer case had to be replaced twice. First time vehicle was in the shop for 48 hrs the next time (7-10 days later) a full week. |