Workshop Guides
Good parts are only half the job. Knowing how to fit them correctly matters just as much.
I own a GMT400 and have been working on it for years. The repair and maintenance guides on obs-uae.com are written from that firsthand experience, not sourced from a generic database or written by someone who hasn't turned a wrench on one of these trucks.
The guides cover common failure points, maintenance intervals, and step-by-step repairs specific to the GMT400 platform. If you're ordering a part and want to understand the job before you start, that's the place to go.
We don't have similar guides for the Mercedes-Benz SL R107 and Land Rover Defender as we did not find something written with the same authority of someone that owns and is passionate about their car. Once we find one, this page will be updated.