It's fraught with problems to be fair.
With regards to equipment, on your car you need tow points, something solidly attached to the chassis, a jate ring or tow ring/ball solidly attached to the bumper/dumb irons.
I'm not a fan of using the tow ball on the back of the car, jate rings are (IMHO) a much better option.
The key is to ensure that the tow point on your car is solid and it's fixed to something solid, not a rusty chassis or rear cross member.
A 10M long, 4 ton endless roundsling would be ideal as they can be fixed and used in a variety of configurations.
Application: Lifting, softer than duplex slings so better for delicate surfaces, manufactured to the BS EN1492: 2000 standard with test certificate Material:
slingsandstraps.co.uk
To attach to your car either a 5/8", 3.25T 'Bow' shackle or a soft shackle.
To attach to the load I would use a 2 ton duplex strap
Lift loads of up to 2 tons with these polyester Duplex Lifting Slings, complete with reinforced eyes for added security. Use one or more of these slings with
slingsandstraps.co.uk
The strop can be past around something solid on the car you are pulling out (the load), the sling can pass through the eyes of the strop and then attach to your car using the shackle.
How you attach your sling will define the distance you are from the load. 5M (max) or 2.5M with the sling folded in half.
Both the sling and the strop will not break instead they will rip bits off the load or your car, it's therefore important that you connect both ends to something 'solid' and be aware of how much load you are applying.
Don't snatch, take up the tension and then apply a gentle pull. Nothing sudden.
Make sure no one is between the load and you. Pull in straight lines.
Some say you should always let the "customer" attach the rope to his car but I always have a conversation first along the lines of, "If this pull damages your car in any way I am not liable" ...
I have refused to do some as there was nowhere to attach the strap to and the car was well stuck in the mud.
These days I have a winch which makes life 50 Million times easier.