Adjusting backrest locking switch unit (microswitches): Audi A5
Step-by-step adjusting backrest locking switch unit (microswitches) for the Audi A5: 14 steps. What to remove, in what order, and what to check after.
Workshop procedure for AUDI — the exact step sequence and torque figures, straight from real workshop data.
🧭 Before you start
Fits: Audi A5 (8T, 2007–2016)
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- If sleeve T40180 is not making contact with lug, or if backrest locking switch is actuated by sleeve, switch must be adjusted. — Unclip carriage lock (1).
- When adjusting backrest locking switch, leave sleeve T40180 attached to pin.
- Front edge (arrow B) of gauge must make contact with movable fitting element (1).
- Depending on the switch setting, the backrest adjustment motor may stop even before it has reached the lock position. In this case run the motor to the lock position again - gauge must be »clamped«.
📋 Procedure
- ⚠ The gap between the pin (3) and the lug (4) of the backrest locking switch must be checked with the backrest locked.When fitting sleeve T40180, take care not not to damage lug (4). — Push sleeve T40180 onto pin (3) as far as it will go.
- ⚠ If sleeve T40180 is not making contact with lug, or if backrest locking switch is actuated by sleeve, switch must be adjusted. — Unclip carriage lock (1).
- Release locking tab (4) in direction of (arrow).
- Move carriage (3) with backrest locking switch (1) in direction of (arrow A or B). [Note: When adjusting backrest locking switch, leave sleeve T40180 attached to pin.]
- Clip carriage lock (1) into place.
- Position gauge T40179 or gauge T40181 on fitting element (2).
- Front edge (arrow B) of gauge must make contact with movable fitting element (1).
- Apply an external power source (12 V) to the backrest adjustment motor.
- Move backrest forward until fitting element (1) makes contact with gauge T40179 or gauge T40181 and motor shuts down. [Note: Depending on the switch setting, the backrest adjustment motor may stop even before it has reached the lock position. In this case run the motor to the lock position again - gauge must be »clamped«.]
- Turn spindle (2) until spindle nut (1) actuates button (arrow).
- Engage locking bush (4) with spindle (3).
- Take out gauge.
- Move backrest slightly to rear with adjustment motor.
- Move backrest forwards again until adjustment motor shuts down.
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Who makes these pages, and how
TorqFix was built by a mechanic — after a 2,700 km drive with five roadside repairs that no diagnostic tool could explain.
The figures on this page come from manufacturer workshop documentation and are shown as they are. The page is assembled automatically from that data — it is not written by an AI. The AI works in the chat, where it answers for your specific car. It writes nothing here.
Variants of the same model differ. Cross-check torque against the factory manual for your engine before final tightening.
Seen a figure that does not match your manual? Write to us — we correct it and note when. support@torqfix.com
The story behind TorqFix →Workshop data on this page last updated 20 Sep 2026.