Err code 714

Try disconnecting the battery fro a minute, reconnect and enter the code on the radio.

hi not sure what you mean by fuel volume regulator fuel pump ect is underneath the car near the rear wheel right hand side of the car the sender unit which tell how much fuel is in tank is at the top of the petrol tank meaning a full tank removan unless there is a cap under the rear seat part which gives access to top of tank then it goes to manifold and injectors the relay for the pump is usualy in the boot next to the battery

Here's the link and I'm sure you will get the solution of your problem
MERCEDES BENZ SLK SERVICE REPAIR MANUAL 1998 2004 DOWNLOAD

check the gear box fluid levels this is usually the cause of most merc faults on the box

Have you cleaned and lubed the spring?

How do you locate a speed sensor on a SLK 230 turbine speed sensor is it out or is it in the trinity

that cant be it that code doesnt exist in my program

only a turbo "kicks in".a supercharger is a compressor that uses the speed of the engine, so the faster the engine the more pressure....use the gearbox for rapid acceleration....

the release is under the dash for the main lock the safety is by the rt oor left headlight

first thing I would try, disconnect the battery to the car for a minute, then reconnect it. that may correct your problem.