Engine starting problem

In the link

https://www.google.com/search?q=MERCEDES-BENZ+E-Class+%28W211%29+serpentine+belt+schematic

..

Hi Diego.
1954 is the starting point in creating the new range of trucks by Mercedes-Benz. Everything started with light upgrade and rename of the previous series. The L3500 and L4500 models have received three-digit numeric codes - L311 and L312, which indicated the type of installed engine. The design of trucks has not changed (externally can be distinguished only by windscreen wipers, installed from below, not from above as on the previous version). There was also a four-wheel drive LA version. In 1954, a 4.6-liter diesel engine, installed on fire chassis "L311F", has received a turbocharger for the first time, which increased power from 100 to 115 hp. Totally about 175 thousand trucks of L311/L312 models have been made.
Mercedes Benz L311 L312

Must be a rather new car because the e220 cdi is listed as a first drive on the 2010 copyrighted site that I saw:
http://www.autoexpress.co.uk/carreviews/firstdrives/234603/mercedes_e220_cdi.html

call mb ask for service and give them vin number and they will provide you i did the same for my mb.

Looks like your glow plugs might be going out.

1- If engine is not cranking but hearing a click then

a- Problem with battery.

Try to jump start then if battery is over 5 years, replace battery

b- Solenoid works but not the starter.

Need to repalce the starter.

2- If engine is cranking but not catching on, then the problem is with the Bendix part. it is an intergrated part of the starter.

Replace the starter.

Is the AC on? The compressor can take alot of power and make it lope. Engine mounts can make it shake. coils, cap, rotor and wires for tune up at a minimum. EZL if you can find one cheap. MAF also can cause issue. If it is a 1991-1995 check the engine wiring harness as they get brittle and degrade.

the filter might need to be replaced, there's a bypass valve that opens up when the filter is plugged to avoid starving the engine of oil. without the resistance of the filter, oil pressure is low. PLEASE RATE MY ANSWER.

ihave a diesel e320 won't start

alternator not givinging enough power or as they might call it the gernerator is failing replace accordingly

check to make sure your head gasket didnt blow out
by dropping the oil in oil pan if choclate milk looking head gasket gone