Thermostat change at the CDI ! Many questions and later illustrated instructions

Hi ́ Be careful to change the thermostat with my CDI because even at +8 degrees I have to drive the car continuously over 120 km/h to briefly see the 3 egg in the display I hardly drive slower already it disappears again. And with stationary gas I need more than 10 minutes for the first egg so the thermostat must probably be broken…. But I have to ask a couple more 1. With the English instruction www.evilution.co.uk/650 Do I not really get clear?!!!!?! That’s not the complete sink but only a slight tilt of the engine OR ? 2. And I really need to do nothing besides to expand the cross struts to support the engine and solve the other two screws ? 3. And then the car lifter by max. 8 cm sinks ? 4. Does not this break any bearings or mounts? To the expansion of the thermostat I found this instruction seems to be going on next thanks-forum.de/modules.php? 5. And an important question I would have to buy something for a coolant I do not have to do it again for tomorrow?