07-12-2012, 07:05 PM
BenzWorld Senior Member
Date registered: Oct 2007
Vehicle: GL320 CDI - 2008, '04 Touareg V10 TDI, '85 Unimog U1700, '83 Mitsubishi 4WD turbodiesel PU
Location: Pacific NW
oil change refers to engine oil only. Tranny fluid is very different stuff and performs much more like hydraulic fluid than the lube/cooling function of the engine oil.
If the 'truck' has ever been used heavily loaded or for towing (or if you don't know but suspect it has) then have a good indy change the tranny fluid now. Otherwise wait until the Mercedes required maintainence program says to do it.