fit a socket to the nut on the tensioner and turn it anti clock wise.slip the drive belt of. put the new belt in place . turn the nut anticlock wise an d fit new belt
The relay of C180 is locate at the front near the brake servo in cover with black top.
it is usally a dry connection on the fan speed switch
To slacken the fan belt on a Vito 115, first, locate the tensioner pulley. Use a wrench or a ratchet to turn the tensioner in the direction that releases tension on the belt. Once the tension is released, you can remove the belt from the pulleys. Remember to double-check the belt's condition and alignment before reinstalling a new or adjusted belt.
Take it to a mercedes garage
The fan belt is fit onto a Mercedes Vito by loosening the alternator bracket and allowing it to move downward. The belt can then be slipped over the remaining pulleys and then back over the alternator.
How much it is going to cost
no
On my Mercedes sprinter the cause of the fan belt vibration at low idle speed was the pully on the alternator.This pully should ratchet in one direction.
You can find a diagram for fitting a fan belt on a Mercedes 308D Sprinter in the owner's manual. You can also find it at select auto part stores.
Start by taking old one off first, noting direction, and what pulleys it goes round first, then slacken the tensioner. Then re-fitting is reversal of removal.
To replace the fan belt on a 2003 Mercedes ML 270 CDI, start by disconnecting the negative battery terminal for safety. Then, locate the tensioner pulley and use a wrench to release the tension on the old belt. Remove the old belt, routing the new belt according to the belt diagram typically found in the engine compartment. Finally, ensure the belt is properly seated on all pulleys, reapply tension, and reconnect the battery.