I have a Trakka conversion in my 1982 Transporter.

About 10 years ago the 12V side of the fridge just stopped working. 240V operation was normal. I pulled the fridge apart and in the end, an Engel agent in Brisbane sold me a new oscillator unit (as they were apparently known to be a weak spot). That solved the problem. (I suspect this is a weak spot in several models of Engel fridges. These fridges are often "OEM" and don't show the Engel name anywhere. They were made by Sawafuji.)

Earlier this year the same thing happened again to my fridge. This time I wasn't even going to contemplate paying $100+ for an exchange unit, even if it was available.

After a lot of chasing around, I was able to fix the existing oscillator for around $5.

If anyone has this issue, or knows of others with a similar fridge (in a VW or other), I'd gladly pass on the relevant information via PM.

Dave