Originally Posted by mave4

Hello everybody,

I'm new on this forum, however I found when looking for an information about diag interface / unit suitable for both of my Jaguars, ie. XJ 4.0 Sovereign '96 & S-Type 3.0 V6 '00, I bought recently.
Do I need to buy the WDS or can use SDD with VCM (Rotunda) or Mongoose interface?
Both of the cars have OBDII socket, however I can read only some information by ELM327 and cannot clear any fault codes. A Delphi Autocom I'm using shows these cars as not fully supported. As a side note I'd like to mention that I'd like also to perform some programming (ie. function switching for remote & lights, key immo registering, etc.).
Important is that I found many misleading information about IDS / SDD, Mongoose and VCM Rotunda and their support for older cars. Mongoose is told as support cars after 2005, while VCM is supposed to not support XJ'96.

Please don't be offended by a little misuse of this topic; I spent a lot time googling for answers and here in the message #7 finally I found a tip, but not answering all my questions.

Thank you for your help.
Mark