Almost every time I switch into the second gear, a quite loud crackle sound is heard shortly. It only happens when switching into the second gear, other gears are fine. I depress the clutch fully of course.
The vehicle is a Mercedes-Benz 308D, a T1 van, year 1992, model 602.316
The transmission is a 5-gear manual gearbox - type G1/18-5/4,69 (some sources describe it as G1/18-5/4.7) model 711.113.
Is it something to worry a lot about?
How to fix it?