Mercedes Sprinter, Telma Retarder revival part 1, it needs a bit of TLC!
When I bought my van the Telma Retarder was disconnected and the control box removed, this is part one of two or three videos as I attempt to get it operational.
Here is a link to the 906 Sprinter body builders manual various chapters cover the PSM unit that I mentioned.
http://www.purpleport.co.uk/reference...
Here's a link to a video showing how they work.
• Telma Operating Principle - English
This link is to useful tech info such as coil resistance and airgaps
http://www.emrtech.co.uk/resources/TE...
And this is the parts list for my particular model of retarder.
https://www.hwag.com/data/2016/ET_Kat...