However, with 5,204,000 passengers annually, the trolleybus route is by far the busiest of all the operator's lines, and generates 74 percent of its total revenue.

9, and passes through the municipalities of Vevey, La Tour-de-Peilz, Montreux, Veytaux and Villeneuve, and as of 2019 served a total of 41 stops.

Plans to replace the tramway with a trolleybus line were first developed in 1938, but in view of the outbreak of World War II, the design work was discontinued.

Nine trolleybus duties were required for the 10-minute clock-face schedule offered all day, allowing for a seven-minute turnaround in Vevey, and eight minutes in Villeneuve.

During the Montreux Jazz Festival, which takes place in July, 12 vehicles operate a special, more frequent service.

Prior to 12 December 2010, the VMCV offered an express bus service between Funiculaire Vevey and Montreux Marché every 20 minutes during peak times on the former line 1.

A large hospital with 300 beds and 1,000 employees was due to be built in Rennaz between 2013 and 2015, and a corresponding passenger potential for the trolleybus was anticipated.

[4] With the fleet already due for replacement (based on age) by 2020, VMCV decided to purchase new trolleybuses that were capable of operating on battery power for a portion of each trip, so that the service extension from Villeneuve to Rennaz would not require the construction of new overhead wires.

[5] A new fleet was ordered, but its delivery was late, so initially, on 1 September 2019, VMCV extended only a few trips to Rennaz and operated them with diesel buses.

Similar vehicles with the type designation AG300T were later supplied to the trolleybus systems in Esslingen am Neckar, Salzburg, Solingen and Arnhem.