Mercedes hard start cold. runs rough. I’m having trouble gettin...
Mercedes hard start cold. runs rough. I’m having trouble getting it to start when cold. The fuel filter was replaced with OEM 12,000 miles ago ( less than 2 years ). When accelerating. More history, earlier this summer I had issues with the vehicle stalling out and very low RPMs when stopped (this was during the hottest part of the summer). However, recently a new problem developed and now it having trouble trying to start cold as well. Mar 18, 2025 · Explore facts, owner feedback, and recall information on Mercedes-Benz cold start problems to keep your vehicle running smoothly. It could take 3 try’s or 20 try’s before it will start. It has never failed to start, but it usually requires 2 tries. It has around 100K miles on it. Dec 7, 2024 · Hi all, Got a s212 e350 facelift 120,000 miles. What mileage and what year is your car ?? The O ring replacement is a common fault when the engine is around the age that mine is. Once warn, it'll run like new. . (which annoys me since it usually started right away) And the it idles rough between 600-750rpm. I checked the battery and had a load test done on it, it is ok Feb 25, 2016 · Once the air is cranked through the engine will start and run ok for the rest of the day. Sometimes the car takes an unusually high amount of cranks to start when cold. cold start injector not activated. This effectively means the engine has to crank over lots to bleed the air out before it will start. This was a somewhat sporadic issue. Just after it’s sat overnight or after several hours I have this Oct 5, 2010 · Its been a year since I've owned the car now, fixed everything. Why do people face Mercedes cold start problems? What causes them and how can you fix them? In this video, we’ll explain the common reasons your Mercedes struggles to start in the morning and May 12, 2016 · Difficult first start in day (hard cold start) Jump to Latest 16K views 9 replies 7 participants last post by jivko2828 Oct 11, 2017 M Feb 21, 2025 · Glow plugs doesn’t come after I start car, only on ignition, everytime on ignition, no matter if car is cold or hot. I haven't noticed this behavior at any other time. How to fix a Mercedes That Won't Start When Engine Is HotAppreciate my help: Make a small donation: https://paypal. If it has not been started for a few days or it has sat in cold weather (30 to 40 degrees F) it cranks for maybe 5 seconds prior to starting (that seems like a long time when it is happening). What I mean by that is the cranking sounds Nov 23, 2013 · This cold start problem happens when the weather is near freezing mid-30's degrees. Would appreciate help - fuel pump? cold start valve? pressure leak? any advice woul. Aug 14, 2017 · I can start the car back up with minimal cranking if i try to restart it within about 1-2 minutes. me/irepairautosCheck out my book here: h Jan 21, 2023 · 2000 E320 with approximately 384k miles. cold start. As far as I know, the glow plugs have never Feb 15, 2026 · Hard starting. Nov 8, 2012 · I own a W124 230e 1985 with hard hot starts. Had the car running flawlessly last few months. Here's the problem, the car is hard to start when cold. After 5 minutes its back to the hard cranking and pedal. It runs fine after it’s started and will start fine for the rest of the day. Then, when it does start it runs rough Jun 24, 2004 · Mine was very hard to start when cold, because it had sucked air into the fuel lines as it cooled down. 11/30/2008 1/1/0001 Aug 22, 2025 · Mercedes Hard Start? Top Fuel System Issues Explained Are you experiencing a hard start issue with your Mercedes? This common problem can leave even the most reliable vehicles struggling to start, especially after sitting overnight or during cold weather. After May 10, 2008 · I own a 1989 190-E 2. In many cases Buy Repossessed Vehicles DIRECTLY From Local Banks Nov 27, 2019 · Hey guys, Here's a head scratcher: My 420SEL starts right up without hesitation when cold, but acts like it isn't going to start after driving the short distance to my office. Well, now I think a problem is arising. I also suspect it has something to do with the winter blend gas because it was quite cold during November and the car fired right up every time. (Credit Image: F1 2026: Australian Grand Prix: Russell Wins March 8, 2026, Melbourne, Victoria, Australia: Race winner GEORGE RUSSELL of Great Britain (Mercedes-AMG Petronas F1 Team) on track during the 2026 Australian Grand Prix, at Albert Park. I've noticed if I leave the car for day or two without starting, the first start will be harsh. 6. It takes way less time to start cold than hot, lets say around 8-10 sec. As well i forgot to mention that I changed thermostat 1 month ago, because temperature wasn’t rising above 75-80 celsius, now its perfectly fine. When I pump the accelerator 5 to ten times and continue to crank the engine the car eventually starts. Understanding the root causes behind these hard starts is crucial for maintaining your car’s performance and reliability. I know compression fuel spark ignition. The battery was replaced earlier this year. 1500 rpm 8/30/2011 1/1/0001 92 190e hard start cold. Mercedes should have put out a service bulletin on the renewal of these pipes as they deteriorate with age, but as it is the whole world has to find out the hard way, you could fill a book on the discussion of this one topic Nov 13, 2015 · I have a 2010 GL 350 Bluetec. Oct 18, 2006 · I have a 1990 300SE, 65K miles, it's tough to start at times (sometimes will just crank endlessly), other times it'll turn over (very reluctantly) but be very rough and hesitant. rnylhvmyjftfrzcpubcoemxmkxgkztiicomdsehvpyvdjnwuwv