Date registered: Sep 2006
Vehicle: 2004 CLK 240 Coupe
Location: Norfolk. UK
Mentioned: 11 Post(s)
Quoted: 405 Post(s)
Are you removing the pan to change the filter during your ATF flush? If so the connector to the ETC is easy to access.
The SI in the WIS advises: "When repairs are performed on automatic transmission 722.6, the pilot bushing A203 540 00 53 and its O ring must be replaced to avoid any further visits to the workshop."
It also states: "After the pilot bushing is replaced, the new bushing should be marked with a green dot on the white ring so that is not changed again. Pilot bushings with a green dot are only to be replaced if they leak".
So, when you get access to the connector, check for a green dot, as it may have been changed already by a previous owner. However, if it looks original, you should change it while you are there, as it is relatively cheap.