Can I replace the Thermostat Myself??

[Timon2210]

Hello All,
I have a Passat B7,2013 year model,with 2.0 TDI engine code (CFFB),I'm having a problem with the car gets to operation temp. as it takes so long to get to (90oC) and stay there,as it get down while driving fast or down a hill,so I took a look on the location of the thermostat,but it seems tricky to be done as it's hidden somehow.

So I would like to know if is't a DIY job,or I better take it to expert mechanic??any advice would be very helpful,tips would be great.

Thank you all in advance,
Tim