MercedesBeats
New Member
- Joined
- Nov 29, 2011
- Messages
- 5
- Car
- C180
Hi all,
This is my first post so please excuse me if I sound like a noob.
Car Info
Model:C-Class C180
Year: 1999
Type: W202
Engine: M111.921
I purchased a C180 earlier this year. It's been running really well for months however it's recently developed a bit of an issue. Over the last couple months, if I try to drive on a cold engine, the car just jerks as if it's got no power whatsoever. It won't accelerate at all, almost as if it's not being given any fuel. The only way to drive it is to accelerate from 900rpm - 1500rpm and then change to the next gear and so on, until you reach road speed. However, if I start the car and allow it to warm up to 90degrees before driving it, it performs pretty much fine.
Also, regardless of the above, another issue began occurring at the same time. When driving on Motorways, the car randomly loses power at around 70-80mph. It's only a very short loss of power and it can be regained in a couple of seconds by releasing the accelerator and then pressing down on it again slowly and gently.
In general, the car itself feels quite under-powered. I understand it's a heavy car but I have a strong suspicion that it's not giving me all the power it has under the bonnet.
I didn't really attend to the issue initially because I knew the car was due for service shortly. Anyway, I had my Dad take the car for it's service and MOT last week at a family friend's garage. It passed the MOT without issue. It was serviced also and was it was plugged into the Mercedes Star Diagnostics system. The mechanic explained to my Dad that a couple of cylinders were misfiring. He attended to it and said "It's fine now". I suspect he changed the plugs. Being a family friend, I was charged very little for all the work and as a result I can't really complain. Also the garage is pretty far away and going back there comes at a high cost for me.
My Mum's brother is a very experienced mechanic also, and we met over the weekend. He explained to me that I should just change the plug leads as the car sounds like it's misfiring and the leads sound like the culprits. When I inspected the engine, I couldn't identify any traditional plug-leads. So I called my uncle back and explained what I could see. He then advised me to purchase 1x Ignition Coil Pack and replace one of the existing ones. If I noticed a difference, I should consider my problem solved. If not, he said I should put the original coil pack back, and replace the next one instead and so on until I identify the faulty pack/s.
He said, they're really easy to swap. So, I tried to identify the packs. I couldn't work out where they are and how to access them. I'm not a dufus and have previously serviced my older cars with ease. However this is my first Mercedes and I'm out of practice. I've attached pictures of my engine and would appreciate any advice, direction & guidance any of you can offer me.
Many thanks & kind regards,
Mr Beats
This is my first post so please excuse me if I sound like a noob.
Car Info
Model:C-Class C180
Year: 1999
Type: W202
Engine: M111.921
I purchased a C180 earlier this year. It's been running really well for months however it's recently developed a bit of an issue. Over the last couple months, if I try to drive on a cold engine, the car just jerks as if it's got no power whatsoever. It won't accelerate at all, almost as if it's not being given any fuel. The only way to drive it is to accelerate from 900rpm - 1500rpm and then change to the next gear and so on, until you reach road speed. However, if I start the car and allow it to warm up to 90degrees before driving it, it performs pretty much fine.
Also, regardless of the above, another issue began occurring at the same time. When driving on Motorways, the car randomly loses power at around 70-80mph. It's only a very short loss of power and it can be regained in a couple of seconds by releasing the accelerator and then pressing down on it again slowly and gently.
In general, the car itself feels quite under-powered. I understand it's a heavy car but I have a strong suspicion that it's not giving me all the power it has under the bonnet.
I didn't really attend to the issue initially because I knew the car was due for service shortly. Anyway, I had my Dad take the car for it's service and MOT last week at a family friend's garage. It passed the MOT without issue. It was serviced also and was it was plugged into the Mercedes Star Diagnostics system. The mechanic explained to my Dad that a couple of cylinders were misfiring. He attended to it and said "It's fine now". I suspect he changed the plugs. Being a family friend, I was charged very little for all the work and as a result I can't really complain. Also the garage is pretty far away and going back there comes at a high cost for me.
My Mum's brother is a very experienced mechanic also, and we met over the weekend. He explained to me that I should just change the plug leads as the car sounds like it's misfiring and the leads sound like the culprits. When I inspected the engine, I couldn't identify any traditional plug-leads. So I called my uncle back and explained what I could see. He then advised me to purchase 1x Ignition Coil Pack and replace one of the existing ones. If I noticed a difference, I should consider my problem solved. If not, he said I should put the original coil pack back, and replace the next one instead and so on until I identify the faulty pack/s.
He said, they're really easy to swap. So, I tried to identify the packs. I couldn't work out where they are and how to access them. I'm not a dufus and have previously serviced my older cars with ease. However this is my first Mercedes and I'm out of practice. I've attached pictures of my engine and would appreciate any advice, direction & guidance any of you can offer me.
Many thanks & kind regards,
Mr Beats