Rear Parking Sonar

[matin]

hi,

my
car is is220d se-l 2006. When i turn the parking assistant on, it shows warning
alarm with sonar check message and shows my rear driver side sonar faulty. all
other sensors work without problem.

i
guess i must change that sonar. but i couldn’t find it anywhere and also im not
sure can i do it myself or not with some normal tools.

it
will be helpful if someone has done it before give me some advises and where
can i find it.

thanks