Mercedes-Benz Forum banner
Cancel

NLG Conversion

6033 Views 17 Replies 5 Participants Last post by  Samoila Stefan, 
Samoila Stefan
2
Finally I have managed to get my baby the NLG conversion! No more starting or ignition problems! The installation is mainly simple: In the trunk there's a toroidal NLG tank (38 liters capacity) with a filler cap drilled on the right fender. From there a gas line and some control wires from the tank's valve and fuel pump to the engine compartment. There it's installed an electrovalve after a relay, a gas reductor, heated by water lines from the climate system, and a mixer into the air-filter housing. Here's the schematic on the internet (I'll post pictures - when I'll have a camera available - of the actual installed system):


Here I've scanned the gas mixer installation manual for this system:


More photos will follow!
See less See more
Reply
Save
Like
1 - 12 of 18 Posts
Samoila Stefan
1. The gas is injected directly through the air inlet (no more injection problems, clogged injectors or fuel filter, fuel pump anomalies, cold start valve problems, fuel regulator defects, fuel distributor interrupted feed, in effect the system cuts off the fuel pump when running on NLgas so all these problems that belong to the fuel delivery system are avoided).
2. NLG price is half than petrol's (fuel consumption is though increased by maximum 15%).
3. Lower emissions at the tailpipe (comparative to euro 3 noxes).
4. Possibility to switch to petrol in case of out-of fuel cases (I have 4 leds indicating the NLG tank level in my in-dash switch). Start-up can be operated in 3 ways: forced petrol, petrol and then gas switching just after revving the engine over 2500rpm, forced NLG (I prefer this one...starts like a charm :)).
Reply
Save
Like
Samoila Stefan
Ontario Canada has it... I'm moving there this summer and on my future car (hopefully a merc too) I'll have one too... :)
Natural Gas Vehicles (NGV) Ontario | Home

Natural Gas Vehicles (NGV) Ontario | Home

Over there I can fill up my car at home too... :)
Reply
Save
Like
Samoila Stefan
Well as I was there to equip my 190, I saw a VW Touareg and a Hyunday SUV (both cars like after 2005) for service checks and computer tuning on their NG systems (mostly all the indigenous old cars like my DD - B. knows - are converted on this type of fuel). Also I saw a Lincoln 3.8 Signature on LNG while redoing my distribution :).
Reply
Save
Like
Samoila Stefan
FIY: starting the engine in NGV mode:
Cold.
Depress the accelerator pedal half-way (too much it will backfire and pull out the air hose under the throttle, too little it will overflow the engine so a 20 minutes beer brake is implied), turn the key, and off she goes. Simple as that.
Warm.
Turn the key (just a bit... :)).
Reply
Save
Like
Samoila Stefan
Today we rode to Bucharest and back. At a fill-up after 182 kms (113,09 miles) I've measured the consumption: 12,69 litres/100kms (18,53 mpg). I mention that when running on gas it was 13 litres/100kms (18,09 mpg). Considering this at a price almost half of gas, I'm very happy (somehow equals a consumption of 98 octane gas of 6.5-7 litres/100kms - 36.18-33.60 mpg, not bad for a 2.0 granny)!
Reply
Save
Like
Samoila Stefan
5
Pictures

Well, as promised I'll post some pictures with the BRC Italy natural gas system on my 190E:

The gas switch (3 positions - 1. gas start, 2. gas start then nlg at 2krev, 3. nlg start). It also shows by 4 green leds the level in the NLG tank.


The gas expander (on the right inner fender, uses warm water from the cabin warming circuit)


The system's relay


The gas feeding hose to the air filter (enters the air filter from below) and the 2 blue cap cut-off valves near the expander.


The tank also have two safety valves on it (it's in the spare wheel compartment, toroidal shaped, 37 litres capacity of liquid pressurized gas, the feeding line is on the right rear fender, near the rear bumper, has a 2 dollar plastic screw-in cap which is unbolted by the nlg station personell or occasional thieves...:) on my DD it has been stolen 4 times and I did not bought one anymore, I hope this one will last)
See less See more
Reply
Save
Like
Samoila Stefan
A somehow better picture of the fuel selection and gas tank level indicator switch (also on the right by the center console are the motion sensor and impact sensor for the alarm):
See less See more
Reply
Save
Like
Samoila Stefan
8
Some pictures of the natural gas sprayer hidden into the air-filter housing (the part looks pretty much as a gas stove head, poining right into the venturi, ha!):












Here you can all se the feed and return lines from the NLG gas tank hidden into the spare compartment, the mounting big bolts for the tank, the electric-control wire for the shut-off valves at the tank.


So, afterall a 12% consumption on NLG is not bad considering the gas (98 octane regular unleaded) price over here (2.57 lei for an US dollar), and the NLG costs 1.5-1.75 lei per litre (0.545-0.681 usd incl. tax):


Here the gas at this station (OMV) is 3.37 lei per litre (1,225 usd per litre inc.l tax.)
See less See more
Reply
Save
Like
Samoila Stefan
Mine operates exactly the same (the performance loss is not so noticeable for my baby) and btw the filler must be on the fender not in the bumper to avoid damage to the gas valves in case of accident (safety regulations, in the bumper it's illegal!!!).
Reply
Save
Like
Samoila Stefan
I guess Poland and Romania are different in vehicle safety regulations even if they're both in that EU utopia... :)
Reply
Save
Like
Samoila Stefan
Well your consumption is better (my engine is a zombie with 2.0 and 2.3 limbs altogether...:))

This is a better pic so people can see the filler...
See less See more
Reply
Save
Like
1 - 12 of 18 Posts
This is an older thread, you may not receive a response, and could be reviving an old thread. Please consider creating a new thread.
Mercedes-Benz Forum
BenzWorld.org forum is one of the largest Mercedes-Benz owner websites offering the most comprehensive collection of Mercedes-Benz information anywhere in the world. The site includes MB Forums, News, Galleries, Publications, Classifieds, Events and much more!
Full Forum Listing
Explore Our Forums
W126 S,SE,SEC,SEL,SD,SDL Class R/C107 SL/SLC Class W163 M-Class W124 E,CE,D,TD Class W210 E-Class
Top