Users have uploaded specific diagrams for common problems (like the tailgate wiring breaking). Search: "W169 door lock wiring diagram forum" before you pay for anything.
: Includes wiring for door control units, electric steering locks, and the AAC (Automatic Air Conditioning) How to Access Specific Diagrams mercedes a class w169 wiring diagram
: Located under the passenger footwell floor panel, near the fuse box. System Wiring Layout Users have uploaded specific diagrams for common problems
Remember: Electricity follows rules, but only if you know the path. Get the correct wiring diagram, take your time, and your W169 will reward you with years of reliable service. Do not trust the random PNG files on Google Images
Haynes makes a manual for the A-Class (2005-2012).
Do not trust the random PNG files on Google Images. The W169 had facelifts (2008) and massive variations between the A150 and the A200 Turbo. You need a specific diagram for your VIN.