The cars – BMW, Audis and Mercedes – were set on alight in Berlin's Westend district, in a route leading towards Charlottenburg, on streets including Eichenallee, Lindenallee and Altenburger Allee.
Eight other cars parked next to those set on fire were also damaged by the blazes, as well as a scooter and a bicycle, according to a report in Tuesday's Tagesspiegel newspaper.
Cars are often set on fire in Berlin, particularly the more flashy, expensive kinds, often as something of an unfocused leftist or anarchist political statement.
Last Wednesday night nine cars – including three Audis and two Mercedes – were set on fire in the Steglitz and Zehlendorf districts. Two other cars, a Skoda and an Opel parked nearby were also damaged.
On Thursday night four more cars were set on fire in the Charlottenburg and Schöneberg areas.