Before purchasing a van to convert, I had to determine the make and model. Space and reliability were hinge points, but there were other factors to consider.

The final contenders were the Freightliner MT45 and the Sprinter T1N.
Ultimately I went with the MT45.

The Pros

Space

A little extra space can add up big time. The extra width of the MT45 is a huge factor, because it allows the option to orient a mattress lengthwise across the width of the vehicle. The dimensions of my queen-size folding mattress are 60” x 80” — the 20” difference was crucial for incorporating a shower/bathroom while maintaining a comfortable counter size for cook prep, cook top, and dishes.

The extra 11.25” allowed for vertical 2x4 trusses, giving me 3.5” of space to use for insulation while maintaining a finished ceiling height of over 6’5”.

Overall vehicle cargo space will determine the size of your refrigerator, cooktop, cook prep, sink, water tanks, insulation, battery bank, bathroom, closet, bed frame, and storage.

More square feet than a Sprinter

Sprinter T1N 158wb (high roof)*

Cargo Bed Length - 165.9”
Maximum Width - 68.3”
Interior Height - 73”

MT45

Cargo Bed Length - 168”
Maximum Width - 86.5”
Interior Height - 82.25”

*I chose a 158 for comparison because the 170 was not available pre-2007, which is when the more expensive, less reliable Sprinters were released. I wasn’t interested in post ‘06 Sprinters, so I didn’t include them in my research.

Lower expected maintenance costs

Sprinters newer than ‘06 (post-T1N) are notorious for common and costly emissions system repairs. In general, German parts are more expensive than American-made parts, and service work on German vehicles also costs a bit more.

I plan to do most mechanical maintenance and repairs myself, but price difference and availability of parts can make a huge difference. Sprinters also often acquire rust, something the aluminum bodied MT45 doesn’t F with.

Reliability

Engine

While it’s possible for Sprinters to run into the high six figures, the 5.9 Cummins is an engine highly sought after by diesel enthusiasts. Keep her wet with oil and she’ll stay with you over a million miles!

Engine life expectancy is dependent on SO MANY variables (proper pm, timely repairs, good vehicle operation practices, luck, etc.). Research the hell out of your prospective vehicle’s engine before you settle on one.

Emissions

The Sprinter bluetech emissions system sucks hard. The majority of costly repairs arise from here, but if you own a T1N, it’s nothing to be concerned with.

The Badass Signs

The Cons

Noise

The cab is noisy, and unless you do a little work to cut down on the noise (i.e. insulate the dog house, rattle-proof the sliding doors) it’s going to be noisy every time you drive down the road.

Gas mileage

MT45 gas mileage usually falls somewhere between 9-15 mpg. The Sprinter maintains an amazing 21 mpg average. The MT45 definitely leaves something to be desired in fuel economy.

Dead Heat

No four-wheel drive

I don’t know of any four-wheel drive MT45s. Newer Sprinters can come equipped from the factory with 4WD, but get ready to spend $60k+. Older 2WD Sprinters can be modified to 4WD, but this is usually ~$10k and not known by Sprinter gurus to be exceptionally reliable mods. If you own a 2WD vehicle, be cautious and invest in a set of chains for snowy conditions.

Dually

Sprinters and step vans both offer dual-axle (dually) options. You’ll pay more for a dually, but they offer advantages like a higher payload/towing capacity, more stable vehicle operation (especially in windy conditions), and backup protection in the event of a blown out rear tire.

The MT45

Before deciding which van is right for you, carefully consider which characteristics you value most.

John Rambo (my adventure pup) and Lexi Lex (my lovely girlfriend) are going to be living with me in the van, so the extra space was a huge consideration. I’m going to be full-time living in my MT45 for the next 2-3 years, so I opted for something I thought would provide a little more comfort as a home.

The reliability of the 5.9 Cummins engine and Allison Transmission will also result in greater resale value if I decide to sell it in the future. With all the blood, sweat and tears you’ll put into building an RV, it’s important to consider whether or not it will be appealing to potential buyers after you’ve put a couple hundred thousand miles on it.

MT45 cost info

I bought my MT45 from a dealer in Oregon for $9500 out the door. If you’re in the market and have access to used car dealer auction sites, this could save you a lot of money on vehicle purchase.

Alternatively, check out public auction sites (such as govdeals.com) for more economical vehicles (and occasionally down right steals). If you’re up for traveling and/or buying sight unseen, searchcraigslist.org is a great source for national vehicle sales.

MT45 pros:

Space
Reliability/maintenance costs
Badass signs

MT45 Cons:

Noise
Fuel economy

Stalemate:

4 wheel drive (or lack thereof)
Dually options