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#1
02-01-2011, 10:25 PM
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what is this strange box with a knob on it? 1995 E320 wagon
So I was digging into the dash of my e320 wagon trying to "fix" my combination stalk when I came across this strange box with a knob on it
 timing reset? magic mpg increaser?
__________________
 77' 300D, "Cartman" SOLD @ 150K (didn't know what I had)  83' 300SD, "The Superdon" 325k+ @ 28mpg 95 E320 wagon, "Millennium Falcon" 231k+ @ 24 Mpg 95 E300D, "Sherley" 308k @ 33.69 Mpg, currently anticipating a head  99 Suzuki Intruder "Trudy" @ 45 mpg 
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#2
02-01-2011, 11:00 PM
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I think that's what's called the MAS relay? I believe it's related to the fuel pump.
-J
__________________
1991 350SDL. 230,000 miles (new motor @ 150,000). Blown head gasket Tesla Model 3. 205,000 miles. Been to 48 states! Past: A fleet of VW TDIs.... including a V10,a Dieselgate Passat, and 2 ECOdiesels. 2014 Cadillac ELR 2013 Fiat 500E.
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#3
02-01-2011, 11:10 PM
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Correct, a MAS relay, the knob is for removing the relay.
__________________
Click here to see a photo album of my '62 Sprite Project Moneypit (Now Sold)
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#5
02-02-2011, 01:16 AM
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The MAS relay is supposed to be behind the battery IIRC. If this is under the dash, it might be a similar looking device.
But first thing comes to mind is the MAS relay for me too. This controls the fuel pump, among other things.
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http://farm8.staticflickr.com/7271/7...144c3fc1dc.jpg
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#6
02-02-2011, 07:25 AM
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Too bad...no magic
engine control unit.
__________________
77' 300D, "Cartman" SOLD @ 150K (didn't know what I had) 83' 300SD, "The Superdon" 325k+ @ 28mpg 95 E320 wagon, "Millennium Falcon" 231k+ @ 24 Mpg 95 E300D, "Sherley" 308k @ 33.69 Mpg, currently anticipating a head 99 Suzuki Intruder "Trudy" @ 45 mpg
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#7
02-02-2011, 08:19 AM
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Not a MAS relay unit!!
That is the ODB1 diagnostic module that records check engine information.
__________________
MERCEDES Benz Master Guild Technician (6 TIMES) ASE Master Technician Mercedes Benz Star Technician (2 times) 44 years foreign automotive repair 27 Years M.B. Shop foreman (dealer) MB technical information Specialist (15 years) 190E 2.3 16V ITS SCCA race car (sold) 1986 190E 2.3 16V 2.5 (sold) Retired Moderator
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#8
02-02-2011, 10:38 AM
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Cool
 What fuel injection system would a 95 E320 have? Are they LH Jetronic or were they still CIS?-J
__________________
1991 350SDL. 230,000 miles (new motor @ 150,000). Blown head gasket Tesla Model 3. 205,000 miles. Been to 48 states! Past: A fleet of VW TDIs.... including a V10,a Dieselgate Passat, and 2 ECOdiesels. 2014 Cadillac ELR 2013 Fiat 500E.
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#9
02-02-2011, 11:01 AM
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HFM-sfi
Hot Film Management
__________________
MERCEDES Benz Master Guild Technician (6 TIMES) ASE Master Technician Mercedes Benz Star Technician (2 times) 44 years foreign automotive repair 27 Years M.B. Shop foreman (dealer) MB technical information Specialist (15 years) 190E 2.3 16V ITS SCCA race car (sold) 1986 190E 2.3 16V 2.5 (sold) Retired Moderator
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#10
02-02-2011, 03:00 PM
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I'm going out on limb here but i guess your car is a California version of E320 and this a diagnosis control unit with the part number A0155454332. Just shoot me if i'm wrong.
__________________
600SEL '91  300E 4Matic '88 240D '83  280SE '77  350SE '73  The most complex systems can fail in the simplest way. Contra verbosus noli contendere verbis, sermo datur cunctis, animi sapientia paucis. i don't believe in the lord! He's never bought me a Mercedes Benz.
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#11
02-02-2011, 03:31 PM
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Quote:
Does the fuel injection computer also control the ignition system? -J
__________________
1991 350SDL. 230,000 miles (new motor @ 150,000). Blown head gasket Tesla Model 3. 205,000 miles. Been to 48 states! Past: A fleet of VW TDIs.... including a V10,a Dieselgate Passat, and 2 ECOdiesels. 2014 Cadillac ELR 2013 Fiat 500E.
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#12
02-02-2011, 04:17 PM
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Yes, & Yes
__________________
MERCEDES Benz Master Guild Technician (6 TIMES) ASE Master Technician Mercedes Benz Star Technician (2 times) 44 years foreign automotive repair 27 Years M.B. Shop foreman (dealer) MB technical information Specialist (15 years) 190E 2.3 16V ITS SCCA race car (sold) 1986 190E 2.3 16V 2.5 (sold) Retired Moderator
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#13
02-02-2011, 11:44 PM
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Yes & No, it is a 104 with SFI, but the ignition was not integrated until ME-SFI
BTW the LH-SFI and HFM-SFI are essentially the same, the only real difference is the mass airflow sensors, the LH being hot wire, and HFM being hot film. I wouldn't argue about the control unit until I saw where it is. Based on where I believe it is I still think it's a MAS, MBdoc could be right, it's definitely not the engine control module though Gilly
__________________
Click here to see a photo album of my '62 Sprite Project Moneypit (Now Sold)
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#14
02-02-2011, 11:47 PM
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Quote:
__________________
Click here to see a photo album of my '62 Sprite Project Moneypit (Now Sold)
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#15
02-03-2011, 12:01 AM
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Quote:
-J
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