Shoppers are being called upon to help save Morrisons in Hounslow West, which is earmarked for closure.
Feltham & Heston MP Seema Malhotra wants members of the community to work with staff on ideas to improve the supermarket and increase business.
She issued the appeal following a meeting with Morrisons bosses and with Stephen Fry, chief executive of Hounslow Chamber of Commerce.
"This was a very helpful meeting which showed the commitment there is to looking at every opportunity to keep the store open and support the wonderful staff who serve the community every day," she said.
"We need people to send in their ideas and views about what can be improved in the next few days and to encourage more people to come and shop there."
Ms Malhotra said a consultation process was currently underway, with staff coordinating ideas which will be reviewed by bosses at Morrisons.
She asked for any ideas to be sent to Seema.email@example.com by Thursday, January 28.
The announcement came a year after the retail giant revealed its Hounslow West store had been spared the axe amid national closures.
Mr Fry said he recognised the commercial pressures on the retail sector but would do everything possible to keep Morrisons in Hounslow.
"We will do whatever we can to maintain Morrisons investment in the shopping offer in the borough in order to bring the best competitive prices for people to buy their groceries," he said.
“Hounslow needs big badge names to support SMEs (small and medium-sized enterprises), ensuring local people get the best possible offers available throughout the borough."