W123

I bought this car Nov 2004 and it had a rough idle when warmed up. In an effort to solve this I set the valves, replaced the injectors with rebuilt ones. No help. Meanwhile, and for other reasons, I installed a rebuilt engine Jul 2006. By Sep 2006 it too was idling rough after warm up.
Once again I verified valve settings and replaced the injectors with rebuilt units. I also replaced and adjusted the damper bolt, replaced the the motor mounts, transmission mounts and the engine shocks. No help.
In Jun 2007 I went all out and put in a dealer supplied rebuilt injection pump. No help.

I have some leakage around the diff cover. I was not able to ascertain whether there is a gasket or just a type form-a-gasket is required. Thanks, Bill

I just bought my first Mercedes a week ago. I have seen and heard quite a bit of discussion about the diesel fuel lubricity of the new low sulphur fuels. Naturally, opinions I have found seem to range from "Hey, it's no big deal", to predictions of doom within the next 12.5 minutes, none of which site any decent sources for their information. The standards of fuel production specify lubricity, but there seems to be some scepticism about how closely the refiners and distributors are adhering to those standards, and for that matter, whether the standards meet the needs of diesel engines.

Ken,

Is it safe to assume that any new B1 brake band replacement as part of an overhaul would be the newly designed lower friction coefficient band, or does this need to be specifically ordered from MB?

Thanks,
Bill