144″ Crew Van 3rd Row Seat Install
For our 144 Crew Van 4X4 we needed to add a 3rd row. The great thing is the Crew van and Passenger Van’s have the seat mounts built into the frame of the van regardless of Crew or Passenger. You could add all 5 rows into the Crew Van but at that point why not buy a Passenger Van? But I only needed 3 rows and not the 5. Plus, the Passenger Van has a crap ton of windows, which we did not want. So it would cost us about $2,800 to have Mercedes install the third row, nope we good! Found a 4 person bench seat from a 2015 Passenger Van on Ebay for $900.
Please note, I take NO responsibility if you mess up your van or somehow you get into a crash. This is what I did to my van and I posted it for others who would like to do the same. Please don’t be stupid when modifying vehicles.
I did some research and found some people had installed their own 3rd row. Perfect! So I unlocked the 2nd row seat and removed it from the van. I unbolted the mounting brackets and trim pieces. Took me about 10 minutes. The floor of the van is split into 2 parts, front and back. You only have to mess with the front half. The floor is a rubber mat on top of a wooden sub-floor which is attached to the metal floor with velcro…..
So now you have the bare metal floor. There are no predrilled mounting holes for the 3rd row, but, the when your drill through the sheet metal there are factory mounting nuts. So, you need to have a little faith and a drill. Measure 33.79″ from the center of the front mounting holes of the 2nd row, this will be the measurement from the front bolt of the 3rd row. Mark it and drill a small pilot hole, if it goes through easy then you are on the money. Make sure, using a flashlight, you have drilled through the center of the nut. When you have done so, drill the hole with 1/2″ bit. Make sure you don’t drill the threads to the nut. Try out the bolt, BAMM, your in buisness! Place the mounting plate on the hole and line up the front hole and mark, and then drill the rear hole. Do this for all three mounting points.
Ok so now the mounting holes are drilled it’s time to cut up the floor. I placed the wood floor on saw horses and placed the rubber mat on top. I used a razor blade to cut out the pre-outlined mounting holes. After that I used a marker to mark out the area of the wood floor I need to cut out. With that done you just need to cut out your mounting holes with however you can. Once you have your floor all cut up it is time to get it back into the Van. The velcro makes it difficult to get it to line up. Do your best. Once the wood floor and rubber mat is down and lined up properly, it’s time to try out the new mounting plates for the 3rd row. Line them up and bolt them up. Replace all the trim and tie-down.
Now get a friend and get the seats back in. I was able to do all of this in 2-3 hours, with time for lunch, with minimal tools and knowledge.