in a 182/172 or even any new clio with reflective screen
You have to place the RA2 in the squeare cut out in the middle lower half of the screen
If it is not placed as far back as it can go, then you will have problems with reception.
In most cases i have found after installign them they are OK, but most people prefer to purchase the extra re-radiating antenna to make a 100% sat lock.