Welcome to Company Car Driver's coverage of one of the biggest car shows in the world, which our correspondents covered live on 13 September.
The 64th Frankfurt IAA was the latest event in a line of German car shows stretching back to Hotel Bristol, Berlin in 1897, where just eight vehicles were shown to the public. Now held biannually, it's a much bigger affair than it was all those decades ago.
As ever with large motor shows, concept cars featured heavily, alongside unveils of new derivatives of some of the most popular cars currently available. There were also a few headline-grabbing supercars from the top sports car firms, and of course the ubiquitous smattering of scantily-clad ladies should you get bored of staring at metal.
Read on for our manufacturer-by-manufacturer coverage from Frankfurt 2011:
Alfa Romeo
4C concept joins twin-clutch Giulietta
Audi
New V8 engines for S6, S7 and S8, pair of concepts unveiled
BMW
Pair of concepts under 'i' sub-brand, new Efficient Dynamics models launched
Chevrolet
American brand reveals its Insignia alternative and concept sports car
Citroen
DS5 diesel hybrid crossover, ultra-prestige DS3 and low CO2 C3 launched
Fiat
Next-gen Panda and 500ByGucci unveiled
Ford
Focus ST, Fiesta ST, new ECOnetic models and Evos concept unveiled
Honda
All-new Civic and refreshed Insight unveiled
Hyundai
New i30 models gets all the attention while the i40 and Veloster get another airing
Jaguar
C-X16 concept launched to take on Porsche 911 and Audi R8
Kia
Kia 3-door Rio, facelifted Soul and GT concept unveiled
Land Rover
DC100 concept paves the way for new Defender in 2015
Lexus
New GS-series Lexus revealed to public
Mazda
All-new CX-5 crossover ushers in SKYACTIV, facelifted '3
Mercedes-Benz
New B-Class, ML-Class, SLK and SLS AMG Roadster revealed
MINI
Two-door coupe unveiled as quickest ever production MINI
Peugeot
508 RXH diesel hybrid and HX1 concept unveiled
Porsche
All-new 911, Cayman Black Edition, diesel Panamera and electric Boxster concept unveiled
Renault
Facelifted Twingo and Frendzy concept unveiled
Skoda
Czech manufacturer unveils its Ford Focus rival
Smart
Clever new concept car from Smart shows off new tech
Suzuki
Suzuki launches new Sport model of its Swift hatchback
Toyota
Toyota reveals plug-in Prius, Prius MPV, new Hilux and Avensis facelifts
Vauxhall
Vauxhall shows Zafira Tourer, GTC, VXRs, Combo, RAK e concept
Volkswagen
Volkswagen Up city car and hot Beetle R revealed
Volvo