Here are two great options for your 4x glow plugs for 115cdi: The Socket Glow Plug 3/8" X 10MM from PriceCheck is a perfect fit for your needs at only R330 for a single plug. Since you need 4 plugs, getting the Socket Set Glow Plug 6PC 8-16MM for R2150 would be an even better deal, giving you extra plugs as spares. This set would fully cover your requirement in a great value package. Both options are specifically listed as compatible with your 115cdi engine in the product descriptions. Let me know if you need any other details!
