The original diagnostic tool VCDS (VAG-Com Diagnostic System) from Ross-Tech is a leading PC software and hardware extension for professional ECU diagnosis and coding on VW, Audi, Seat, and Skoda vehicles. Perform service work, basic settings, retrofits, and special requests easily yourself with the help of VCDS. Almost at manufacturer level, many diagnostic functions can be performed.

Compatible with all VW, Audi, Seat, and Skoda models from approximately 1989 up to the current models.
Over 19,770 error codes including German plain texts.
Ideal for coding ECUs.
Full K, KL, KKL Bus (KWP 1281 / KWP 2000) support.
Full CAN Bus (KWP 6000) and extensive UDS/ODX (KWP 7000) support.
Includes three VCDS plug-ins: Scope, TDI, and Acceleration.
Includes E-OBD function for various EU models and manufacturers from 2001 or 2004 (Diesel).
Includes free VCDS software updates for a minimum of 12 months.
Includes free VCDS manufacturer forums and wiki use.
(Product registration with the manufacturer necessary.)

VCDS function overview (excerpt):

Retrieve vehicle information.
Reset service intervals.
Initiate DPF regeneration.
Switch daytime running lights on/off.
Activate retrofits.
Carry out coding.
Set readiness code.
Read and clear errors.
Open parking brake.
E-OBD capable.
And much more.