Transformer clothing

One way that non-Transformer species seem to have influenced Cybertronian culture is the relatively rare occurrence of Transformers wearing clothing.

Capes

Optimus and Megatron: Slaves to Fashion

From time to time, some high ranked Cybertronians tend to wear capes. Presumably they are a symbol of office, as only generals, commanders, and other such leaders have been seen sporting them. Exactly what material these capes are made from is unknown, but one presumes that Earth-style fabrics are likely extremely rare on Cybertron (which could make the capes even more special, considering).

• Starscream wore a cape, large shoulder pads, and a crown at his coronation as Decepticon leader. The crown alone survived Galvatron's blast (only to be crushed under his feet).

• The Nine Great Demon Generals mostly wore capes, except Trypticon, who wore a Batman-like cowl in the Zone Story Pages.

• Optimus Prime and Megatron wore capes while serving as the leaders of the Cybertron Alliance. Whether this was a symbol of high office, or just a desire to look pretty, is unknown.

• Armada Scavenger wore a large, body-obscuring cloak when he first arrived on Earth.

• Great Convoy is a cape.

Trenchcoats

Quite a few characters have been depicted wearing trenchcoats, mostly when involved in detective work or similarly secretive activity.

• Nightbeat has been drawn quite a few times wearing a trenchcoat and fedora, due to their connection with detective fiction.

• The Micromaster Air Strike Patrol wore trenchcoats and fedoras while trying to pass as human professional wrestlers. Interestingly enough, these coats somehow obscured large physical protrusions on their bodies (jet intakes, wings, etc.).The Interplanetary Wrestling Championship!

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Robot dancing!?

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Sometimes, people on Earth wear clothing to look like various Transformers. Sometimes this is sad, sometimes this is hot.

Others

Hiii! there is a naked bot under that coat

• In an early (More Than Meets the Eye, Part 3) plan to trap the Decepticons, the Autobots had to run around in lab coats. It was very silly.
• Six-Speed's curiosity about human clothing led him to examine the closets of his human friends Bud and Coby. However, his attempt to dress like a human basically amounted to putting random articles of clothing on his limbs, looking more ridiculous than clothing-wearing- Transformers normally do. Which is kinda amazing
• The Jointron brothers have been shown wearing ponchos and sombreros, as well as using banjos and maracas.
• The Space Mini-Con Team and Armada Grindor have disguised themselves as humans using large heavy jackets, coats, baseball caps, hats, sunglasses, and other items of clothing to try to blend in with other people in robot mode.
• Most of the Pretenders had clothing molded onto their Pretender shells. But at this clothing was just for pretend - it's actually part of the Transformer's shell (which itself might be considered a form of clothing).

It's great to learn! (Because knowledge is power!)

• Grimlock is a king of fashion, at times wearing a crown, a bandana, and... err..
• The Maximal Elders wear robes. They have their reasons.
  
  
  From Teletraan I: The Transformers Wiki, a Wikia wiki.