* Based on opinions and should be considered as general guidance only.
- Reliability (2)This model year is prone to issues with the 7G-Tronic transmission and potential balance shaft gear wear, alongside frequent electronic sensor failures.
- Maintenance (2)High costs for specialized parts, such as the Airmatic suspension components and premium service requirements at dealerships, make it expensive to keep on the road.
- Technology (3)For 2008, the COMAND system and available rear-seat entertainment were impressive, though the interface is dated and less intuitive than modern systems.
- Comfort (5)With its six-passenger seating and ample legroom in all three rows, the R-Class offers a first-class travel experience that rivals high-end luxury sedans.
- Dynamics (3)The 3.5L V6 engine provides smooth power for highway cruising, but the vehicle's significant weight and long wheelbase make it feel cumbersome in tight corners.