How do I remove the starter in my 205 gti 1990 1.9

Remove the air filter and battery, undo the 3 bolts that hold the starter on (depending on model they might be under the clutch linkage , one accesed through the linkage. they will have either 13mm hex heads or 7 or 8 mm allen key heads. when the motor is loose twist it and disconnect the battery cable and start wire and wiggle the motor out, replace it in reverse order.