Butler Parker (SWF crime series, 1972-3)

A crime fighting British butler named Joshua Parker who drives a Winchester taxi in a series based on a collection of German pulp fiction novels, and brought to life in a German TV show.
Episode 1: Hello Taxi:
London footage of London Transport AEC RT and Routemaster buses. Identifiable are RM2083 (ALM83B), RM301 (WLT301), RT3504 (LYR923), RM1831 (831DYE):
Episode 21: Die Kidnapper:
Paris footage includes this Cityrama sightseeing Neoplan Skyliner:
Episode 25: Schottischer Whisky
A Scottish episode complete with comedy kilts, Edinburgh Corporation 672 (ASC672B) takes on a passenger. It's a 1964 Leyland Titan PD3/6 with Alexander body; a similarly bodied Leyland Atlantean passes in background: