[Abagail]

Something such as this should work:

pawn Код:

#include <a_samp>

public OnPlayerTakeDamage(playerid, issuerid, Float: amount, weaponid, bodypart)
{
    if(issuerid == INVALID_PLAYER_ID || issuerid == playerid) return true;
    
    if(GetPlayerState(playerid) == PLAYER_STATE_ONFOOT && GetPlayerState(issuerid) == PLAYER_STATE_DRIVER)
    {
        new Float: x, Float: y, Float: z, Float: vx, Float: vy, Float: vz;
        
        GetPlayerPos(playerid, x, y, z);
        GetVehiclePos(GetPlayerVehicleID(issuerid), vx, vy, vz);
        
        if(vz - z <= 0)
        {
            // the player may be car parking
        }
    }
    
    return 1;
}

Though for death reasons, death reason 49 will detect if the player has killed the player with their vehicle, you can use this and Z positions to determine if they car parked or not.