remove the sofa and carpets and put it under the sun. Let it stay for 1/2 day and the ordor will be removed. Meanwhile, let all the doors and the trunk opens for circulation.
Couple of years ago I left some meat at the trunk for two days. When I found out, everything was too late - vehicle was filled with rotten smell.
Tried active charcol, lemon rising with water and soap but all failed. Didn't 洗車籠 as it need $_$ (and I'm so poor).
Last try was leave the car and remove everything (rug, sofa) and let them bake under the sun. Leave all doors and trunk open. After baking for two half-day, no more odour.