Used to relieve pressure on the timing belt by pushing back the automatic idler pulley.
Due to extremely limited space, in particular on Transporter models, it is very difficult push back the automatic idler pulley, in order to change the V-ribbed belt.
The tension tool is operated by a 3/8" socket.
Suitable for the Mercedes Transporters series 208 D to 410 D with engines types OM601 and OM602 and also for Mercedes passenger cars with hydraulic pump for self-levelling suspension.