Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
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HOMESERVICE MANUALSBMW2011128I 2D CONVERTIBLE, N51, AUTOMATICREPAIR AND DIAGNOSISBODY & FRAMEDOOR LOCKSBODY EQUIPMENT - REPAIR (E88)GENERAL51 00... NOTES ON FITTING WINDOW GUIDE SEALSGENERAL NOTES
2011 BMW 128i 2D Convertible, N51, Automatic
General Notes
2011 BMW 128i 2D Convertible, N51, AutomaticSECTION General Notes
- Use only the BMW-approved anti-friction agent for fitting
- Application only at room and object temperatures between 18 and 25°C
- Anti-friction agent dries at different rates depending on the quantity, temperature and ventilation and becomes sticky
- Anti-friction agent can only be used for fitting and not for fault elimination (e.g. grating)
- Newly painted parts may only be brought into contact with the anti-friction agent after cooling
- Optimal bonding/attachment to the background surface is achieved after approx. 48 hours. The window guide seal must not be exposed to mechanical strain beforehand (car wash, strength test, etc.).
IMPORTANT:
To avoid grating noises, do not use soapy water (low-surface-tension water with washing-up liquid) or anti-friction agent containing silicone
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When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- • You smell fuel, burning insulation, or see smoke.
- • Brakes feel soft, pull hard to one side, or make grinding noises.
- • The engine overheats, stalls repeatedly, or misfires under load.
- • You are missing required tools, torque specs, or safe lifting equipment.
- • You are not confident in the next step or safety outcome.