I have 1999 E55 when I start it turns over and stalls

cleaning out an air filter is not like replacing still can starve engine --need to also check possible tune up needed --plugs wires --look at cat converter possible clogging --also check and clean or replace egr valve if carboned up will cause stalling and or no start

tune up,fuel filter,air filter,

It sounds like it might be it's timing belt going bad...Check that out.

the timming is off the timming belt must be resetted.
1. do not take it to the dealer. take the car to a ase repair shop.
2. replace the fuel filter.
3. and air filter.
problem solved.

sounds like a major vacuum leak. I would check the hose going to the brake booster(there is a check valve that can fail in that hose as well).

Have you check the O2 sensors? How baout cleaning the MAF and Throttle body? Thermostat?

How does the temp gauge look whn it stalls?

grab plastic in front and pull up. it should slide out of the main air filter housing. the housing is retained by 4 clips that attach to the intake manifold-you will have to grab the snorkels and twist them off the housing then they pull off the intake retaining brackets, grab housing and pull up. it will feel tight around your maf sensor that is normal. be very careful with maff sensor you do no want tp damage the seal that retains the maf to the intake. flip housing over and you will see 8 torx screws remove one side at a time and replace filter elements-make sure housing is clean before reassembly

check your idle air control valve(IAC) its probably dirty and are not able to move freely
the IAC valve controls the air mixture at idol speeds

Replace, or have the fuel filter replaced. Replace the air filter as well. If it still does it, have the fusable link(s) checked, as if the connection(s) is not secure, it will cause the vehicle to start sometimes, or die while driving. Also have a diagnostics done at your local mechanic, or a local automotive store (usually a free service; stores may vary)

try a new set of plugs, wires, and fuel filter. full loaded tune-up. air filter too.

May also be mass-airflow sensor if equipped. does it display a Check engine light?