If you are buying a Class 6 or Class 7 medium-duty truck for service work, TMA mounting, or a voc-body application, the conversation almost always comes down to two chassis: the Freightliner M2 and the International MV. Both are competent, well-supported platforms. Both are widely available in the used market. And in the configuration most fleets actually buy — Cummins B6.7 diesel, Allison automatic transmission, dual-rear-wheel tandem — they are more similar under the hood than they are different.
That means the chassis-level differences are what actually drive the decision. Cab ergonomics, dealer network density, electrical architecture, frame geometry, and long-term resale value all vary between these platforms. Those are the factors worth analyzing.
Powertrain: The Engine Comparison Doesn't Matter Much
Both the M2 and MV are widely configured with the Cummins B6.7, a 6.7-liter inline-six that is the volume engine in this class segment. The B6.7 makes 200–370 hp depending on the rating selected, and it carries one of the best field-service reputations in medium-duty diesel. Parts availability, technician familiarity, and dealer coverage for the B6.7 are essentially equal regardless of which chassis it's installed in — Cummins maintains its own dealer network separate from either chassis manufacturer.
The Allison 2500 and 3000 series automatic transmissions are similarly common across both platforms in the configurations most fleet buyers select. Allison's service network is independent of the chassis manufacturer as well. If your fleet runs a Cummins-Allison combination, the drivetrain service question is chassis-agnostic.
International does offer a higher-output engine option in the MV — the Cummins L9, an 8.9-liter inline-six rated 260–360 hp and up to 1,150 lb-ft of torque — for buyers who need more performance within the same cab. (The International A26, a 12.4-liter big-bore engine, is a Class 8 engine available in the LT, RH, HV, and HX Series — not the MV.) Freightliner's equivalent path is typically a Detroit DD5 or DD8. But for the Class 6 weight range and typical fleet applications, most buyers stick with the B6.7 regardless of chassis, and the powertrain comparison ends there.
GVWR ranges on both platforms span well above Class 7. The M2 106 Plus is rated Class 6–8, from approximately 19,500 lb through 66,000 lb GVWR depending on wheelbase and axle spec. The MV607 covers from approximately 17,999 lb through 54,700 lb (6x4). For most Class 6 fleet applications, buyers spec GVWRs in the 19,501–26,000 lb range. Work with your dealer or upfitter on the spec that fits your payload requirements and axle loading.
Cab Ergonomics and Driver Environment
This is where driver preference creates real operational variance. The two cabs feel different, and operators who spend eight or ten hours a day in one or the other develop strong opinions.
The Freightliner M2 cab is a wider, more conventional-truck-style interior. Sight lines are good. The dash layout has been criticized over the years for switch placement — buttons for key functions can be hard to find without looking, and the center stack on older generations feels cluttered. Current-generation M2 interiors have improved the organization. The driver's seat position feels lower and more car-like than the MV.
The International MV cab (and the MV's predecessor, the DuraStar) has a taller, more upright seating position that some drivers prefer for urban and site work where visibility in tight spaces matters. The instrument panel layout on the MV is cleaner than early DuraStar generations, and International has put visible effort into the interior quality of the current MV. The step-in height is higher than the M2, which matters for operators who get in and out frequently at job sites.
Neither cab is significantly superior on noise, vibration, and harshness at highway speeds. Both are medium-duty trucks, not over-the-road sleepers. The practical test is to put your primary operators in each cab before committing to a platform.
Parts and Dealer Footprint
This is the factor that most directly affects your long-term maintenance cost and downtime exposure.
Freightliner/Daimler Truck operates one of the largest dealer networks in North America. In Texas, coverage is extensive — dealers are present in the major metro areas and in regional markets. Parts availability through the Daimler network is generally strong, and many parts are also available through independent supply chains.
International/Navistar has an established dealer network but has faced well-documented challenges over the years with dealer consolidation and network changes. In recent years following the Traton acquisition, the International network has been stabilizing and in some markets expanding. That said, the practical question for any fleet is not national network density — it's which dealer is closest to your primary operating geography and how they perform on parts availability and service turnaround.
For North Texas fleets, both platforms have dealer coverage within reasonable distance. Before committing to either, we suggest calling the regional dealers for each and asking specifically about medium-duty parts stock depth and typical wait times for Cummins-related repairs that require chassis-side access (injector sleeves, EGR components, coolant routing). The dealer relationship is an asset or a liability over the life of the truck.
Electrical Architecture and Upfitter Interface
For TMA trucks, service trucks with crane and lighting packages, and any application with complex body electrical requirements, the chassis electrical interface matters.
The M2 uses Daimler's proprietary multiplex electrical system (the Common Powertrain Controller and Body Controller architecture). Upfitters who work on M2 platforms frequently have good tooling support. The chassis upfitter body interface (cab-to-body harness, PTO controls, lighting pre-wires) is well-documented, and Freightliner publishes body builder resources through their online portal.
The International MV uses a different architecture, with a Diamond Logic electrical system that allows significant body-electrical customization through software configuration rather than hardwired relay logic. Diamond Logic is a genuine advantage for complex upfits — programmable inputs and outputs reduce wiring complexity on multi-function bodies. Upfitters familiar with the system appreciate it; upfitters who primarily work on Freightliner platforms sometimes push back on the learning curve.
For straightforward upfits — a standard service body with 110V inverter and a few auxiliary circuits — the difference is minor. For complex builds with interlocked lighting, PTO sensing, stabilizer outrigger controls, or TMA interlock wiring, the Diamond Logic architecture on the MV can be an advantage in the hands of an upfitter who knows it.
Resale Value
In the current used market, M2 trucks tend to hold resale value slightly better than comparable MV units, particularly in the Class 6 configuration range. This is likely a function of market familiarity and dealer network depth — buyers in the used market perceive the M2 as easier to source parts and support. The difference is not dramatic, but it is consistent enough to be worth factoring into a TCO comparison over a 5–7 year ownership cycle.
On the acquisition tax side: under the One Big Beautiful Bill Act (P.L. 119-21, signed July 4, 2025), 100% bonus depreciation under Section 168(k) was permanently restored for qualified property acquired and placed in service after January 19, 2025. For a fleet buyer purchasing either platform new in 2025 or later, the full acquisition cost can be immediately expensed in year one. Consult your tax advisor on eligibility and structure.
Fleet configuration affects resale more than chassis brand does. A clean M2 or MV with documented maintenance history, a standard upfit configuration, and reasonable mileage will outperform a neglected unit of either brand in the used market by a wider margin than the brand differential.
Which One to Choose
For most North Texas fleet applications, here is where each platform tends to win:
- M2 tends to win when: dealer proximity and parts familiarity are prioritized, the fleet already has M2 technician experience and tooling, upfit configurations are relatively standard, and resale is weighted heavily in the TCO model.
- MV tends to win when: complex body electrical integration is a priority and the upfitter is Diamond Logic-experienced, the fleet values the interior ergonomics for operators who spend full shifts in the cab, or the specific dealer relationship in your area is stronger on the International side.
Neither chassis is a wrong answer if it is properly specified, correctly maintained, and matched to an upfitter who knows the platform. The most expensive outcome is buying either truck based on a deal rather than fit, and then discovering the limitations in service.
Talk to us
We work on both platforms through our fleet services operation, and our TMA trucks run on both chassis. If you're speccing a new unit and want a practical opinion from people who actually turn wrenches on these trucks, call (940) 600-5131 or contact us at /contact.