The flow behind a squareback and a fastback simplified car models are experimentally investigated. The influence of the inter-vehicle distance is highlighted. Ahmed bodies at a scale of 0.19 (Ahmed et al., 1984) are used in the experiments. The experiments are conducted in a closed-loop wind tunnel using a stereo particle image velocimetry at a fixed Reynolds number Re = 4.9×104 . The present work aims at studying and discussing the influence of a Following Vehicle (FV) and of the rear slant angle (ϕ) on the wake flow topology of the Leading Vehicle (LV). In this paper Four inter-vehicle distances are presented ranging from 0.93hc to 3.70hc with a step of 0.93hc, hc = 54mm being the width of the car model. For the leading vehicle, two rear slant angles are considered: squareback (0◦ ) and fastback (25◦ ). Mean properties of the flow and Reynolds stresses are presented. The transverse velocity measured behind the squareback car model in the presence of FV at 0.93 shows a bi-stability behavior. In order to obtain more characteristics about this unsteady wake, a LASER Doppler velocimetry in one dimensional is used