Just got a 91 350sdl that is close to perfect. It has been garaged for a while, everything works but the radio and antena. any ideas on the radio? Thank you

Nice. Love the SDL. Check the coolant reservoir for oil as the HGs are weak....

First things first... OE Becker radio or aftermarket? Anything coming on like lights?

Antenna won’t work without radio. How is the fuse? If fuse is ok, you’ll have to pull it and start looking for 12v, etc.

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Current Diesels:
1981 240D (73K)
1982 300CD (169k)
1985 190D (169k)
1991 350SD (116k)
1991 350SD (206k)
1991 300D (228k)
2008 ML320 CDI (199k)
1996 Dodge Ram CTD (442k)
1996 Dodge Ram CTD (267k)

Past Diesels:
1983 300D (228K), 1985 300D (233K), 1993 300D 2.5T (338k), 1993 300SD (291k)

No issues with the head gaskets on those. That is the 86-87 D/SDL. The 350 is the rod bender.

It is thought by many that the rod bending comes from partially failed head gasket leaking coolant into the cylinder eventually causing partial hydro lock. I con't know if checking coolant for oil is particularly effective with regard to the bent rods.

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[SIGPIC] Diesel loving autocrossing grandpa Architect. 08 Dodge 3/4 ton with Cummins & six speed; I have had about 35 benzes. I have a 39 Studebaker Coupe Express pickup in which I have had installed a 617 turbo and a five speed manual.[SIGPIC]

..I also have a 427 Cobra replica with an aluminum chassis.

Agree. I beg to differ about hgs only being an 86-87 thing. Have a 91 350sd in the shop now getting a new hg as I started seeing oil cross over. No bent rods, everything checked out otherwise....

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Current Diesels:
1981 240D (73K)
1982 300CD (169k)
1985 190D (169k)
1991 350SD (116k)
1991 350SD (206k)
1991 300D (228k)
2008 ML320 CDI (199k)
1996 Dodge Ram CTD (442k)
1996 Dodge Ram CTD (267k)

Past Diesels:
1983 300D (228K), 1985 300D (233K), 1993 300D 2.5T (338k), 1993 300SD (291k)

The '91's have a 4-piece radio setup. There's the head unit in the dash, a radio receiver in the passenger-side trunk behind the carpet, and 2 amplifiers behind the rear seat. Both the head unit and the radio receiver in the trunk have fuses in them. Check them first. Don't be surprised if the radio is junk. I spent nearly a week futzing around with mine before I said "screw it" ripped the POS out and installed an aftermarket radio. Becker can repair the radio, but they want all 4 pieces at $150-175 for EACH PIECE and they won't touch it unless you send in all 4. Thanks, but no thanks, I can buy something WAY better and WAY more reliable for far less.

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Current stable:
1995 E320 157K (Nancy)
1983 500SL 125K (SLoL)

Gone but not forgotten:
1986 300SDL (RIP)
1991 350SD
1991 560SEL
1990 560SEL
1986 500SEL Euro (Rusted to nothing at 47K!)

Gone and wanting to forget:
1985 524TD 167K (TotalDumpster™) [Definitely NOT a Benz]