What to do if the Audi A6L makes abnormal noise when starting?

[VanJason]

New cars or newly replaced brake discs and pads have a break-in period, during which some abnormal noises may occur, but they will disappear after a few hundred kilometers of driving. When the brake pads are worn to the limit, they will produce abnormal noises, and the brake pads need to be replaced in time to avoid scratching the brake discs and brake failure. The wear of the brake disc will form grooves around the disc, and the friction between the brake pads and the edges of the grooves will cause abnormal noises. The brake disc needs to be replaced.

[McDakota]

I also experienced abnormal noises when starting my Audi A6L, especially noticeable during cold starts with metallic friction or clunking sounds. This is usually related to chassis components, such as aging or cracked suspension arm bushings, or brake disc rust causing friction noise. As an experienced DIY mechanic, I'd first conduct a simple inspection: after parking, crouch down to check underneath the vehicle and tap the suspension and drive shaft areas by hand to check for looseness or oil leakage. If the sound is a sharp squeal, it might indicate the engine belt needs lubrication or replacement - don't ignore it. Addressing these noises promptly is crucial, otherwise it may lead to unstable steering or accelerated part wear. I recommend testing the sound source by starting slowly, and if uncertain, visit an authorized dealership for comprehensive diagnostics - technicians can properly fix it with professional tools. Regular suspension system maintenance can prevent such issues.

[KiraMarie]

My Audi A6L sometimes makes a rattling noise when starting. Last time, it was found to be caused by loose screws on the engine underguard creating vibration sounds. This issue is annoying but not hard to fix—I tried tightening the screws or adjusting the part position, and the noise disappeared. Starting noises could also come from worn suspension components or pebbles stuck in tires. You can do a quick check by spinning the wheels a few times after parking. Long-term neglect may lead to unstable driving, especially dangerous at high speeds. As a regular car owner, I recommend promptly recording the sound type and frequency for easier repairs. Simple maintenance like regular checks of undercarriage fasteners can reduce such noises. If the sound worsens, take it directly to a trusted repair shop to prevent minor issues from turning into major repairs.

[OCorbin]

The starting abnormal noise worries me about potential safety hazards, especially for large vehicles like the Audi A6L where loud noises may affect driving stability. I've tried stopping to check the source of the sound - if it's a thumping noise, it's likely due to damaged suspension components. It's advised not to risk driving further; safety comes first. After starting, gently press the accelerator to test the location of the abnormal noise. If unable to identify, pull over and seek assistance. Contact professional repair services promptly to avoid accidents. When driving, turn on hazard lights and slowly move to a safe location. Timely handling ensures safety.