Actually the C car had OBDII as early as 94 but 96 was the date for all to have. As it turns out, OBDII may have never been fully implemented on MBs. I haven't tried in a while but MB never has implemented Mode 6 reporting.

OBDII also only applies where there is something to look at. Much of the best info MB uses is not applicable and thus not reported on OBDII.

As to MB tools. WIS is not a tool, it is just an information system. It can be had online for much less than 12k a year, how about $3k. It is also available by the day for $18. The software that runs the MB scanner is called DAS and the cheapest form is contained in the MB BASIC2 which costs about $9700 incl sales tax and one year of monthly updates. The bigger version with no more diagnostic capability is called Compact3 and costs over $21k and includes WIS and has a yearly subscription of $7800, which is rather stupid as the DAS software is updated for a year in BASIC for $2000 and the online WIS which has considerably more than the PC based is only $3k a year.

As was stated OBDII only covers the engine and does that rather poorly.

__________________
Steve Brotherton
Continental Imports
Gainesville FL
Bosch Master, ASE Master, L1
33 years MB technician