This is the 6 pin connector plug housing YPC110680 suitable for use with Rover 75, MG ZT, Land Rover Discovery 2, Range Rover and Freelander Webasto Thermo Top C or Z/C fuel burning heaters (FBH).
Often found at a very high cost on eBay but now available at a special price for forum members.
May also be suitable for BMW and other heaters.
Combine with sealed terminals to make up your own connector harness: link
This is a plug housing only and not supplied with terminals/pins, they must be ordered separately.
Land Rover part number for only reference: YPC110680 / C0926
DE: Stecker fuer Webasto Standheizung Thermo Top C TTC TTC/Z usw - Land Rover/Range Rover/BMW.