Hmmm, looks like I have some work to do. My van started running a little hot on really hot days when climbing.Well Yes
There are many who believe in this 5 banger van me included!
Great piece of kit and take just a bit or care with it so that it runs at 90-dgc stabilized even in the height of summer.
With good oil in it and TLC and it will run towards one million miles if cared for.
I see you have got a stated 75,000 miles on it.
Once it reaches 100,000 get, or DIY service the cooling system including a coolant flush, core clean, new MB belt, tensioner, pulleys and a viscous fan & clutch
Check and replace the coolant and that all often forgotten coolant level sensor.
This $25 part is responsible for more engine failures than I care to think about and it is so easy to change with no tools required.
Keep the faith and enjoy the van.