W115, Repair Kit

I have a 1976 300D I love this car. Got it for $1200 and ZERO major complaints and the 28mpg is awesome I am hoping to get this over 30mpg Anyway. 2 things. First I have a slightly leaky valve cover. I plan to repair this and wondered what else I should do while the cover is off ?

hi, i have a 1981 300d i parked one cold snowy night and left it a couple days until the snow melted away and since then i cant get it started, the glow plug light works the engine turns over , ive taken the battery out of my 300sd and tried in the 300d still wont start, ive done the glow plug relay tests, checked the glow plugs with ohm meter,the car has never in the five years ive had it not started,the battery was brand new 8 mos. ago and the neutral sfety switch was replaced a year prior. it seems it wont turn over fast and crisp enough to get it going.

I don't know if this new problem I've found has a direct link to the ongoing problems of the car not starting under any circumstances, but this morning I noticed that everytime I turn the key to position 2, fuse #4 (8 amp) in my main fuse box blows. It supposedly is linked to horn, emission control, carburetor heater (n/a), delay switch, and turn signal lamp. Also, when I hit the hazard lights, fuse # 1 blows. It goes to the warning buzzer, auto. antenna, trunk lamp, reading lamp, clock, rooflamp, hazard warning lights(l/r)and the fuel supply shut off valve.

I'm trying to find undersize rod bearings for a 1976 240D I just picked up. Seems to be pretty easy to find standards but that's it. Is it possible to return a crank journal to the standard size if the bearings aren't available? The engine was totally rebuilt a few years ago but... kid driving, hole punched in oil pan, ran out of oil and that's it.