I'm considering replacing the big end and main bearings on my SLK320. I'm well aware that it would be better to do a full engine out bottom end rebuild with reground crank, new oil pump etc but I'm on a budget and the rest of the car isn't that special to warrant the cost, it also has 135k on the clock which keeps the value low. I just want to get a few more years out of it as a daily driver so intend a reshelling job in situ before it gets too bad and hope it hasn't damaged the crank surfaces yet. A few queries: Dropping the crossmember or raising the engine will be needed. Any suggestions which is easiest? I'm leaning towards dropping the crossmember. I have a hoist to hold the engine up. Any special tools other than a torque wrench and sockets needed? I take it the big end bolts aren't stretch bolts or anything silly? Any other parts needed other than sump gasket and the bearings which I already have? Is there anything I'm likely to have difficulty getting apart (steering column? Engine mounts?) Any advice much appreciated. Thanks Dave I'm 90% sure it's big end knock but will get an expert opinion and oil pressure check before doing the job just in case it's something else but from previous experience that's what it sounds like to me.