Identifying engine components W210 M104.995
 

Hi all,
I have had my W210 1996 E320 since 10 days and would like to understand more about the engine M104.995.

Please help me identify the components in the picture below. I removed the air cleaner and all engine covers for more visibility.
I got so far, admittedly mot much :o
0: transmission fluid dip stick
1:
2:
3: MAF sensor
4: Ignition coil
5:
6:
7:
8:
9: Oil cap
10: (don't know electrical cable to what?)
11: (don't know, looks like injector - red part under wire harness)
12: (don't know electrical cable to what?)
13:
14:
15: (don't know electrical cable to what?)
16: (don't know electrical cable to what?)
17: thermostat
18: (don't know electrical cable to what?)
19: (don't know, looks like AC hose)
20: (don't know, looks like AC hose)
21: throttle body intake
22: air intake magnifold
23:
24:
25: ABS
26: Windshield water container
27: Coolant hose
28: Coolant hose
29: (don't know, it's a black container for fluid, maybe power steering fluid)

I'd appreciate it if you could name the components with their number.
Besides where are the spark plugs, near part # 11, 12?


http://s245.photobucket.com/albums/g...nnotated-1.jpg

1: egr valve
2: air injection valve opens when vacuum is applied from #6
3: MAF sensor
4: Ignition coil x3
5: spark plug wire end x3
6: egr and air injection switch over valves
7: coolant port at cylinder head
8: cam adjuster solenoid
9: Oil cap
10: engine harness cable to coils
11: fuel injector x6
12: engine wiring harness, to injectors, sensors etc..
13: fuel pressure test port
14: fuel pressure regulator
15: cam sensor
16: cam sensor connector cable
17: thermostat
18: throttle actuator connector
19: fuel supply line and return
20: brake booster hose
21: throttle body intake boot
22: air intake manifold
23: fuel cooler supply
24: fuel cooler
25: ABS
26: Windshield water container
27: Coolant hose
28: Coolant hose
29: power steering reservoir

Isn't 14 a part of the high-pressure fuel delivery lines to the fuel injectors?

If you look at 4 & 5 closely, you'll find them linked together in pairs, they all connect to the spark plugs underneath (the M104 uses a wasted spark ignition system, so two plugs fire in two separate cylinders in an ignition cycle).

Isn't 6 part of the EGR system? No. 29 is where my PS pump is, I believe that in some W210's they are made of plastic, not aluminium.

Show you how little I know about my own M104, I should be able to identify most of these...

wow, list completed in no time. Thanks a lot Carson!
Thumb up!

Yet another question, #5 are the spark plug wire end but only 3x, where are the other 3 (for 6 spark plug)?

Yes, #29 is made of plastic and is black.

The other 3 spark plugs are under the ignition coils (no. 4).

New picture annotated.

http://s245.photobucket.com/albums/g...nnotated-2.jpg

That means the coils have to be removed when changing spark plugs? What a weird design :confused:.

i can see the picture a little better on my other computer, 20 looks like another part of a fuel lines,
the brake boster is the black plactic line that passes by the abs unit, and #3 isn't actually the maf sensor, but rather the maf plug