Mercedes V Klasse Diesel Gearbox Slipping

Slipping and unclean shifts on older V-Klasses can point to transfer case issues. I had a similar problem with my own Mercedes, though it's a slightly newer model. Check the transfer fluid. Unusual gear wear inside the transfer case may be the culprit, especially considering the mileage. Is there any noise associated with the shifting? You might want to inspect the transfer case oil for any metallic particles, which would suggest internal damage. It is also worth checking if the correct fluid was used during the last change.

Thanks for the quick reply! When you say 'check the transfer fluid,' what exactly should I be looking for? Also, how difficult is it to inspect the transfer case oil for metallic particles? Is this a job I can do myself, or am I better off taking it to a mechanic?

When inspecting the transfer fluid, look for discoloration or a burnt smell, that indicates degradation. As for the metallic particles, you'd typically drain a small amount of the transfer case oil into a clean container and examine it closely. If you see shiny flakes or a gritty texture, that's a sign of gear wear. Given the potential complexity and the need for specialized tools, I would suggest getting a workshop involved for diagnosis. I would expect to pay around 330€ for a repair involving replacement of the defective gears.

Thanks a lot for the detailed explanation and suggestion to go to a workshop. I took your advice and visited my mechanic. You were spot on – the transfer case oil was indeed the issue, with defective gears causing the problem. Getting it sorted now!