Agreed, M103's need cap/rotor/plug repairs all the time. I think I did it twice on mine in 4 years/40k miles

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-diesel is not just a fuel, its a way of life-
'15 GLK250 Bluetec 118k - mine - (OC-123,800)
'17 Metris(VITO!) - 37k - wifes (OC-41k)
'09 Sprinter 3500 Winnebago View - 62k (OC - 67k)
'13 ML350 Bluetec - 95k - dad's (OC-98k)
'01 SL500 - 103k(km) - dad's (OC-110,000km)
'16 E400 4matic Sedan - 148k - Brothers (OC-155k)

With genuine wires I was able to get 5 years. Bosch cap and rotor last about 3 or so years, spark plugs every year. Buying quality ignition parts is a must on these cars otherwise they go bad rather quick.

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Eugene

10 E63 AMG
93 300te 4matic
07 BMW X3
14 Ford F-150 Fx2

Thanks guys for the replies, I took your advice and started with the simple stuff and may have possibly found the problem. I've done maintenance with this car, wires, plugs, fuel filters but somehow I just happened to forget about my distributor cap and rotor Well I read what you all put and decided to check it out. The same cap and rotor have been on the car since we bought it 5 years ago and who knows how long it was on before that... Popped it off and this is what I found.. Needless to say i'll be ordering the parts today!

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76 MG Midget
78 Datsun 280Z
86 Peugeot 505
01 Subaru Outback

“Owning a car is like owning a dog. Every now and then, it craps on the carpet — but it’s still your dog.” - Jeremy Clarkson

Wow, I have never seen a distributor cap and rotor in such horrible condition. I am eager to hear how the engine runs after installing new Bosch parts.

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Fred Hoelzle