20 Most Recent 2007 BMW 750Li Sedan - Page 8 Questions & Answers

get hold of a proper bmw scan tool and check dtc first befor changing parts

Seat switches are bad. Not unusual given their position. You could pull the wiring harness off and disassemble the switches to look for bad contacts, but likely both switches will require replacement:

Turn on your headlights and try to start the car. If the headlights go from bright to dim or off , then the battery or it's connections are bad, or loose or corroded. If the headlights stay bright, then the problem is likely the starter or it's connections. Hope this helps.

Connect jumper cables to the starter connection which should be visible under the car, hot to the bolted battery cable connection, negative to any ground. Connect the other end to a battery after you have crawled out from under the car.  Also consider; my BMW had the battery in the trunk, which should open with a key.

P2402 - Evaporative Emission System Leak Detection Pump Control Circuit High

Bad neutral safety switch Shannon.

Personally I'd start with checking the fuse panel,on MBnz there're fuses that handle power to l/f&r/rear,r/f&l/rear. If fuses are good &/or power is going through but no action from the window motors then I'd remove one door panel at a time to see where the electrical connections hook up to the window motors and see if motor receives power but no action then could be obstruction on the rails?. If no power to the motor,I'd connect direct power to the exposed motor to see if motor is good. I'd try starting from the fuse panel FIRST!. Hope this helps. Alberto

If you believe them, change the pump.

(same answer as before) - It could be many things but my guess is that you have a cylinder misfire. Depending on the year of your car you can have the system scanned by the dealership (or some auto parts stores like Autozone will do it for free) and find out which cylinder is bad. If you don't have access to a scanner, try replacing all the spark plugs, it's inexpensive and will likely solve the problem.

It could be many things but my guess is that you have a cylinder misfire. Depending on the year of your car you can have the system scanned by the dealership (or some auto parts stores like Autozone will do it for free) and find out which cylinder is bad. If you don't have access to a scanner, try replacing all the spark plugs, it's inexpensive and will likely solve the problem.