There is a DIY section that has DIY articles by the area of the car such as engine, but not by model. I think your best bet is getting the factory manual on disc so you can do your own service and then use the Shop Forum to find out peoples real world experience with whatever you need to service or repair.

The factory discs are typically $20 for two discs. There are people here that sell them also. Good luck with your repairs.

__________________
Doug

1987 300TD x 3
2005 E320CDI