I worked in the retail motor trade for 18 years, however it was not a luxury brand but the leading manufacturer in Britain.
The incentive campaigns varied but nearly always were based on sales objectives. Each dealer had an annual sales objective, then split into monthly objectives based on the % each month represented of the annual figure. So July's objective would be nowhere near a twelfth of the total.
Incentives were based on registrations dates, so the end of a month would be quite busy. I think thats why they brought in road tax of a year and a week. The dealer paid the weeks fee and the customer still got a full years licence if he took it the 1st of the month.
Yes Very poor response I have rattles in both doors,and from time to time the dash and front speaker as well. Wrote to Lexus GB No response at all. Even HOnest John on his forum has listed rattles and what is bad withthe new IS 250 Are Lexus just not listening! Ignore you custmomers at your peril
Alan