well it is finaly sorted. took car to my local lexus dealer found out this noise that everyone thinks is the pins has nothing to do with this . turns out that most owners who get this noise think it comes from the front of the car . in fact the problem was from the rear brakeing system. 1 back disk warpt and the other slightley warp,t causeing the banging noise though out the car and the slight odd feeling in the brakes. turns out lots of is 200 owners overlook the back brakes thinking they work less hard than the front. thinking that they are ok. but if the rear pads get low you may not hear them so much as at the front of the car. hence they seem to get warp,t..so always remember to take a look at the rears as the problem that a lot of u on hear. are getting maybe at the rear of your car not at the front. and olso there are no slide pins on the rear calipers of the lexus is 200.--- anyhow the service was top noch at lexus plymouth they found the fault in an half hour.!!!! the other garages i took my car too dident have any idea. and i wasted nearly 4 weeks trying to find the problem and £400 quid . the only thing that did need doing at the front was 1 caliper.the service was so good at lexus. i got free tea and drinks etc..plus they gave my car a free full inspection too. and olso wait for it they even jet washed the whole car after the work was done. total cost with labour and all new genuine lexus parts was only £365 pounds. the guy at lexus olso said you may have had all this trouble with the car as it has been stood up for long periods of time. (as my car only has 46k) . hope this helps some owners on this site. and thx again to all at lexus plymouth..5 star service..!!!!!