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Steve,1985 Mercedes 300D runs rough at start and blows lots
Steve, 1985 Mercedes 300D runs rough at start and blows lots of blue smoke until the engine is hot. Engine is weak and has a tough time climbing hills. The rough running *seems* to be a result of one … read more
Marty
Marty
Mercedes Technician
Associate Degree
29,460 satisfied customers
ML350: Dash and dome lights stared flickering, and now seems
Dash and dome lights stared flickering, and now seems like a rough idle developing as well… read more
BOBBYSS
BOBBYSS
Automotive Repair/Damage Investigator
Associate Degree
14,569 satisfied customers
Hi Marty - I have a 1984 Mazda B2200 diesel and a Mercedes
Hi Marty - I have a 1984 Mazda B2200 diesel and a Mercedes 300D. How can I check the compression on these engines and what are the accepted values. Thanks. Ray… read more
Marty
Marty
Mercedes Technician
Associate Degree
29,460 satisfied customers
sprinter: Hi , i have a 2007 mercedes sprinter 311cdi which
Hi , i have a 2007 mercedes sprinter 311cdi which smokes occasionally then stops. Im aware that the new shape merc has some sort of self cleaning mechanism to clean the crap from the exhaust but the s… read more
Hipo64
Hipo64
Mercedes Technician
High School or GED
444 satisfied customers
280 se: My 1972 Mercedes with 4.5 v8 runs perfect until engine
My 1972 Mercedes with 4.5 v8 runs perfect until engine gets over 185 degrees. Then it runs rough especially at idle and starts to smoke from exhaust. I have to feather the throttle pedal when taking o… read more
Marty
Marty
Mercedes Technician
Associate Degree
29,460 satisfied customers
300D Turbo: 1984 Mercedes 300D Turbo, started fine before the
1984 Mercedes 300D Turbo, started fine before the really cold weather hit. When it's down in the 20s at night (or lower), I plug in the block heater. When I first start it, I turn the key to the glow … read more
Marty
Marty
Mercedes Technician
Associate Degree
29,460 satisfied customers
Mercedes-Benz 300D: just purchased 1987 300d turbo, car was
just purchased 1987 300d turbo, car was sitting for a little over a year, started up easily enough but on driving away there was a marked lack of power and excessive black smoke under load and even at… read more
Greg
Greg
Shop owner, technician
Vocational, Technical or Trade Scho
5,807 satisfied customers
what all models of mercedes have the diesel engine. 4-5 or
what all models of mercedes have the diesel engine. 4-5 or six cylinder? I know all the 240D and 300D and SD models have a diesel engine but what other models?… read more
Marty
Marty
Mercedes Technician
Associate Degree
29,460 satisfied customers
1995 Mercedes Benz S500: idling..distributor..rotors..the cam
I have a 1995 Mercedes Benz S500 wit 170,000 miles. The car began intermittently idling roughly, then began stalling. First mechanic replace the wiring harness, mass flow meter, distributor caps and r… read more
Anthony
Anthony
Master Automobile Technician
Vocational, Technical or Trade Scho
11,778 satisfied customers
Mercedes: Diesel..Very sluggish?, top speed on Speedometer 85mph..mph
Tested 1980 Diesel Mercedes yesterday. Very sluggish?, top speed on Speedometer 85 MPH and never got there?. 6o MPH was pretty noisy? Was i expecting to much? Charles… read more
Marty
Marty
Mercedes Technician
Associate Degree
29,460 satisfied customers
I have a 1994 Mercedes C280 with 116K miles. After the engine
I have a 1994 Mercedes C280 with 116K miles. After the engine warms up (usually 10-15 min. of driving) the idle starts to surge, around 500 - 1000 RPM. This is most prevalent when at a stop and in neu… read more
Lou P. master tech
Lou P. master tech
Mercedes Technician
Bachelor's Degree
4,460 satisfied customers
1982 300cd: grrr sound..I took the battery out of the sd and made
Hello I have a 1982 300d mercedes, 1982 300cd,& a 1984 300sd. Friday the 300d( wife's car) would not start it made a grrr sound like it was going to turn over but that was all. I took the battery out … read more
Marty
Marty
Mercedes Technician
Associate Degree
29,460 satisfied customers
1984 300D: fuel is leaking from the fuel delivery valve assembly
1984 300D - fuel is leaking from the fuel delivery valve assembly. I have removed the assembly, cleaned and installed new "O" ring to no avail. I get one drop every 7 seconds. The reason I removed it … read more
Marty
Marty
Mercedes Technician
Associate Degree
29,460 satisfied customers
mercedes 300d: 1984 (automatic)..I accelerate..it shifts..boost
Hi, I have a mercedes 300D turbodiesel 1984 (automatic) and at some point when I accelerate, say from 0 to 40 km/h, it shifts really hard (gives a small boost all of a sudden), what could the problem … read more
Nelson Garcia
Nelson Garcia
Vocational, Technical or Trade Scho
1,094 satisfied customers
I have a 1984 Mercedes 300D. the alternator went out so i
I have a 1984 Mercedes 300D. the alternator went out so i bought another one and i still had the same problem so i had it rebuilt. but it still has a problem. there are three "idiot" lights that come … read more
Marty
Marty
Mercedes Technician
Associate Degree
29,460 satisfied customers
87 560SL: about 5 mins..smooth..rough idle..Drove..engine compartment
87 560SL was rough idling - replaced plugs as a start. Got about 5 mins. of smooth idle then rough idle returned. Drove it to work and as I was parking heard a loud pop from the right front engine com… read more
Dan G.
Dan G.
Vocational, Technical or Trade Scho
56 satisfied customers
1984 300D: wont start..ran fine..cranking, smoke comes..air filter
1984 300D won't start--ran fine one day, then won't start. Replaced both fuel filters and primer pump. When cranking, smoke comes from area under air filter.… read more
MBGuru
MBGuru
Bachelor's Degree
282 satisfied customers
my 1985 mercedes 300d is running very hot(230 degrees farenheit),
my 1985 mercedes 300d is running very hot(230 degrees farenheit), clacks in idle and has very rich exhaust. Could this be timing and if so how do I find correct setting. The car had this problem when … read more
joesshop
joesshop
Vocational, Technical or Trade Scho
204 satisfied customers
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Meet the Experts:

MB Paul

MB Paul

Mercedes Technician

3,567 satisfied customers

Qualified Mercedes Benz Diagnostic Technician - 20+ years experience - Workshop Foreman for Mercedes

Marty

Marty

Mercedes Technician

29,460 satisfied customers

Bosch Certified Master Tech. Over 35 years experience.

Lou P. master tech

Lou P. master tech

Mercedes Technician

4,460 satisfied customers

20 years Master Certified excellent fix rate and have access to factory wiring, and instructions.

Michael Warfield

Michael Warfield

Factory Mercedes-Benz Technician

3,132 satisfied customers

Mercedes-Benz Master Certified technician

Matt

Matt

Engineer

643 satisfied customers

Mechanical Engineer with 23 years experience in the auto industry, 8 yrs in formula 1 engine testing

promerc

promerc

mercedes diagnostic technician

553 satisfied customers

Qualified mercedes diagnostic technician & service team manager , ATA registered Master tech

Hipo64

Hipo64

Mercedes Technician

444 satisfied customers

Work and diagnose electronics on daily basis.

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Disclaimer: Information in questions, answers, and other posts on this site ("Posts") comes from individual users, not JustAnswer; JustAnswer is not responsible for Posts. Posts are for general information, are not intended to substitute for informed professional advice (medical, legal, veterinary, financial, etc.), or to establish a professional-client relationship. The site and services are provided "as is" with no warranty or representations by JustAnswer regarding the qualifications of Experts. To see what credentials have been verified by a third-party service, please click on the "Verified" symbol in some Experts' profiles. JustAnswer is not intended or designed for EMERGENCY questions which should be directed immediately by telephone or in-person to qualified professionals.

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