IF Stagecoach have got a good deal involving Mercedes using this as a "loss-leader" then this will be a flawed experiment
Strangely enough, the advertised fuel consumption of buses in service now are generally speaking fairly accurate... quite apart from the fact that companies using the vehicles KNOW for a fact what their consumption is...
Seeing as though there is no compulsory European test for "intensive urban bus service conditions" driving for the class of vehicle the Sprinter is then I would guess the figure that everyone is working on is the normal "urban cycle" test.... something tells me Stagecoach will get a shock when they find out how much more thirsty the Sprinters are than expected...
Something tells me Stagecoach will have done their homework and won't be in for a shock...
Lets not forget that these aren't new and never been seen vehicles. Sprinter City vehicles may be relative newcomers to this type operating environment in
this country, but they are a tried an tested product deployed on similar intensive urban operation in other European countries. I bet Stagecoach know precisely what they've got and the predicted fuel savings I've heard (which are good - between 10 and 17mpg) are based on real world data.
Stagecoach have also been using some of these vehicles intensively for route learning, driver training and familiarisation, so they will be getting a handle on the ins-and-outs of the vehicles.
Looking at the photos of them and of a short wheelbase Optare Solo, why didn't they go for a short wheelbase Optare Solo?
I think the whole vehicle five year Repair & Maintenance contract is more significant than people are acknowledging. My gut feeling is this is an important factor that gives Mercedes a distinct advantage - Optare (along with ADL or Wright) don't have the existing service network to be able to offer this type of R&M package.
Operators like certainty and control of their operating expenditure - set up properly a five year R&M contract offers this (these type of contracts are common in other industries). Everything but everyday expendables is covered (so all Stagecoach need worry about is fluids, bulbs, wiper blades, etc). This means that the burden of employing additional mechanics and technicians, parts stock, depot equipment all falls to Mercedes.
A few final points:
The existing vehicles operating the Ashford Town service weren't the most modern (the Solos for example were largely 58 plate), so replacement vehicles would have been needed.
The vehicles are considerably cheaper to purchase (I understand they are around 33% cheaper than a standard Stagecoach E200 and around 22% cheaper than an Optare Solo).
Ashford isn't the biggest depot (hence why the vehicles have largely been stored at Eastbourne) - this move allows Stagecoach to increase frequencies without finding new or additional depot space - not something they could have done using 'traditional buses'.
Ashford is a rapidly expanding town - it has seen and is to see significant growth in terms of housing numbers - these vehicles and the routes they are being deployed on are intended to capitalise on that growth and develop new travel patters for new residents.