2001 e46 320d occasional warm start problem

SOURCE: How do I change the brake pads on my BMW 320d E46

pull off the wheels than than pull the brake pad housing away from the rotor

SOURCE: BMW E46 320d Fy81457

replace fuel presure regulator

SOURCE: Fitting air filter to E46 320d

remove engine plastic covers by taking out the 5mm allen key bolts,, then remove the pollen filter and cover on the bulkhead, under the filter there are 4 , 30torx bolts , remove these and remove plastic bulkhead, then remove the 5mm allen key bolts holding the air filter cover to the engine, then remove the cover , change filter ,

SOURCE: poor starting problem bmw 318 ti

WARNING! Always wear protective eyewear, gloves and necessary clothing before inspection or work begins. Never crank an engine over when you are near the battery or engine. A battery is filled with explosive gasses that can ignite when extreme heat or a spark is present. A battery could have residual acid on the outside casing so use caution when handling a battery and the surrounding area. Use baking soda to neutralize any suspected acid residue before work begins.

You can check the car battery using a multimeter or voltmeter an electronic one is preferred , connect the black wire to the negative side (-) and the red to positive , WARNING :DO NOT CROSS THE RED AND BLACK WIRES OR SHORT CIRCUIT THE LEADS OF THE BATTERY OR MULTIMETER YOU CAN GET SERIOUSLY HURT!!!!! you should also get a spare watering can and fill it with water ,  (dont reuse for other purposes for safety) and remove those little tabs (usually around 4 or more) and fill it up very little in each tab/cap make sure you DONT fill it to the top. The good condition of a battery is 12.5 and 12.8 volts on the multmeter and when the car is started it
(not driven just started) should around 14V which shows that your alternater (acts as battery charger when driving) is working properly.

SOURCE: BMW E46 320d SE 2002 Poor starting from cold, OK when warm.

rub your **** on the key fob