SHANGHAI/HONG KONG (Reuters) -   After driving his BMW 5 series model for just three years, Chinese futures   trader Jerry Lin traded in his car for an Audi A6.
    His decision had less to do   with performance and more with image: BMWs have become associated with China's   nouveau riche, while Audis are favored by 'old money' and senior government   officials.
    "When people made money the   first thing they did was get a BMW," says Lin, who lives in Wenzhou, a city   known for its rich entrepreneurial culture. "I had a lot of fun driving my BMW.   Now, I want to try something different."
    China's car market is the   world's largest with growth opportunities that are dazzling. About 10 million   vehicles will be bought in China this year, a 500 percent increase from 2000.
    Yet despite the opportunities,   foreign automakers face an uphill battle marketing cars in an intensely   competitive and fickle market.
    "The huge amount of foreign   brands pushing into the Chinese market somehow overloads potential customers   with far too much information," said Jochen Goller, Vice President of marketing   for BMW China.
    "So it is getting more and more   difficult to get brand and product messages through to and understood by the   audience."
    BMW tries to separate itself   from the rest of the luxury car pack with "experiential marketing," hosting   events such as a car rally across China called Destination X which has received   35,000 applicants for only a few places in this year's race.
    Despite the novelty of such   campaigns as well as viral marketing initiatives such as a social networking   website for BMW owners, industry experts say Chinese consumers have little brand   loyalty.
    "Few foreign automakers have   successfully differentiated their brands in China so far because pricing, more   than anything else, is still the number one concern for most buyers," said Huang   Zherui, an analyst with CSM Worldwide, a global industry consultancy.
    "Customer loyalty is almost an   unheard of concept here and even a moderate price-cut can easily swing customers   away to the competing brands," Huang added.
    In China's luxury sector, which   makes up about 5 percent of car sales, Audi and BMW owners are starting to   switch brands without a second thought.
    "We have an Audi at home. I am   here to pick a BMW as a birthday gift," said a woman, who gave her name only as   Wu, as she inspected a BMW 7 model at a Shanghai dealership.