Reviewers studied at TheCarConnection.com generally conclude that the 2009 Mercedes-Benz CLK-Class is fine for two passengers, but four can be a tight squeeze.
Car and Driver warns "rear-seat space is tight for adults." According to Kelley Blue Book, Mercedes-Benz CLK-Class seats "offer a wide range of positions, including the ability to raise the seat bottoms to a significant rake." Cars.com reports that each Mercedes-Benz CLK-Class model "holds four occupants on leather-upholstered seats." ConsumerGuide says "headroom and legroom are adequate for six-footers, though folks taller than that will be short on both," adding, however, "Black Series cars have specific sport seats that keep occupants snug during spirited driving, though some drivers will want more lumbar support."
According to Edmunds, the 2009 Mercedes-Benz CLK "rear seats fold down completely, providing a flat load floor that allows long items to be carried inside the car." ConsumerGuide says the Mercedes-Benz 2009 offers "good space by absolute standards, but the cargo hold is shallow and doesn't extend far back, [and] interior storage is subpar."
When it comes to interior materials, these same sources again express different views. Edmunds notes that while "fit and finish is generally excellent, some of the plastic trim on the upper door panels seems somewhat low-grade for this class of automobile." However, ConsumerGuide says 2009 Mercedes-Benz CLK-Class cabin materials "are more sporty than luxurious...assembly quality is top notch.”
According to Motor Trend, the convertible versions have “Inch-thick padding and slippery aerodynamics (0.30 Cd) that make the convertible nearly coupe-quiet inside at speed, and reinforcements boost chassis stiffness 12 percent over the previous model.” But the CLK isn’t the quietest in its class. Says ConsumerGuide, "the throaty V8 engine makes its presence known regardless of whether it's idling or at full throttle...there's moderate body drumming and plenty of coarse-surface tire thrum as well."