PEPPERELL -- Pepperell-based auto parts company 1A Auto is holding its fourth annual Charity Car Show Saturday at Pepperell Town Field.

All proceeds from the car show will go toward two charities -- the Multiple Sclerosis Association of America and the North Middlesex Athletic Boosters.

Merle Green, who started 1A Auto with his sons Rick and Michael Green in 1999, said the revenue from the show has always been split between two organizations.

"We thought it would be nice to do a well known national charity as well as something for the local area," Green said.

He said they are hoping to get close to 200 cars this year. With an entry fee of $10 per car, plus money earned from a raffle at the event, Green said he is hoping to donate at least $1,500 to each charity.

Last year, the auction raised $1,000 for each charity, with about 120 cars registered. Green said the lower amount was largely due to bad weather; the event has been bigger in past years.

Items raffled off will include four Red Sox tickets as well as gift cards and gift baskets donated by Pepperell-based businesses.

Local businesses have also sponsored the event by paying for things such as the winners' trophies, and many will be setting up as vendors at the show.

"This all started as just a car show. But then we decided to raise money for charity, and when the town gave us use of the Town Field, we decided to make it a town event," Green said.

Green said he hopes the car show will become an annual event that consistently brings Pepperell residents together.

"We're trying to build on Pepperell's sense of community to turn it into a community event like the Fourth of July parade that everyone comes to," Green said.

Although he expects many of the spectators to be from Pepperell, Green is encouraging people from surrounding towns to come as well, either to show their cars or to watch.

There are no requirements to enter a car in the show except that participants must register between 9 a.m. and 12 p.m. on the day of the event. Voting for the winner will end around 1 p.m., after which winners will be announced and presented with trophies.

Green said the car show is the result of a lifelong passion for classic cars. He owns nine classic Pontiacs.

"We started 1A Auto in 1999 and never looked back," he said.

"Now we employ a lot of people and thought it was time to do something for the town."

Follow Chelsea Feinstein at Twitter.com/CEFeinstein.