What year is your sprinter? If it is an older model take it to Wayne Rodd in toledo. He is a Sprinter guru, and even has special tooling to remove broken glowplugs without the headache of replacing the head. If you want his contact info send me a p.m. and I will pass it on. Even if it is a newer...
We saw one that they had truned into a workstation area, with multiple plugs/tables. The other one was changed into one of the "stayfit" rooms with a bicycle, and a few other pieces of gym equipment.
It was meant as a joke, But its true. Ours has its quirks as well. Very similar. The drivers side wiper arm was the one that broke off, and the wiper on that side was always wonky.