According to reviewers, the 2009 BMW M5 doesn't disappoint when it comes to its ability to seat five comfortably. Cars.com notes that "heated M Sport front seats with 16-way power adjustment for the driver" are standard, while the passenger seats are 14-way adjustable. MyRide.com reviewers add, "the spaciousness of the cabin makes for one of the most comfortable rides around." Edmunds agrees, saying, "the supportive seats and commodious backseat further serve to make this an easy car to live with every day."
Edmunds recommends that buyers stick "with the standard 16-way adjustable front seats" because the 20-way adjustable M multifunction seats, which are optional, are "equipped with active backrest bolsters that move inward to brace the driver (or passenger) against cornering loads," and as good as that sounds, the feature is "gimmicky" and makes for distraction at "critical moments." And ConsumerGuide reviewers remark that while headroom and legroom in the M5 BMW are good in the front, headroom is only adequate in the back, and legroom "can grow tight" when the front seats are pushed "far back and lowered."
The M5’s cargo room, which ConsumerGuide says is marginal, is one of the few complaints in this category. "The trunk isn't very wide or deep" and "interior storage is disappointingly meager,” comments ConsumerGuide. MyRide.com notes that the maximum cargo volume inside the BMW M5's trunk is 14 cubic feet, which is a bit of a disappointment.
Reviewers almost unanimously point to the impeccable build quality of the M5. Exterior noises are kept from intruding into the cabin. ConsumerGuide reviewers report, "wind rush is minimal at highway speeds." However, Edmunds raises one issue with sound on the BMW M5, citing "a tinny exhaust note" coming from the engine that they feel is inappropriate for a car as capable as the M5 BMW. Edmunds reviewers attest that "build quality and materials inside the M5 are outstanding," and Kelley Blue Book says that the "brushed-aluminum interior trim can be replaced by either of two no-cost optional woods, and its high-end Merino leather can be optioned up to perforated leather and to cover the entire dash."
Car and Driver adds that "leather covers nearly every part of the M5's lavish interior," and they proclaim the cabin is "a huge improvement over the regular 5-series interior and make[s] you feel as if you were in a four-door Ferrari." MyRide.com reviewers are also impressed by the "signature M Series logos and tri-color stitching on the seat backs and leather-wrapped steering wheel," all of which increase the luxurious ambiance.