Lancia Thema Workshop Manuals
If you want to execute fixes to your Lancia Thema then it is usually recommended to own a Workshop Manual to keep just for personal reference just in case you need to know techniques to remove a particular part such as the Gearbox and match it again effectively.
Lancia Thema Workshop Manuals will provide you with special diagnostic info with regards to your automobile so if something is not working it will help you understand what the problem is and the best way to fix it. After that you can evaluate if this can be done on your own or if the job is too big you can actually book your Thema in to a trusted garage.