I've been looking to purchase a '92 to '95 Mercedes 400E or E420. My problem seems to be finding a car which doesn't overheat. The last two I test drove, both had overheating problems or at least I think they did.
For example, I test drove a '95 E420 over the weekend. It was a one owner car with 88,000 miles on it and the seller confessed that the car had been overheated three years ago. The seller said that the temperature gauge had been pegged out and the car was towed in for repairs. The invoice from the dealer indicated the overheating problem had actually been "repaired" a year ago. What did the dealer do? They replaced the radiator and a couple of temperature senders. When I drove the car, it was a hot day with an ambient temperature of 95 degrees. With the air conditioning on, we got on the freeway. The engine temperature initially climbed to 85 C. Five minutes later, the needle was nearly touching the 100 C mark on a very gentle hill at
70 mph. On another slightly steeper hill at only 50 mph in heavier traffic, the engine temperature reached approximately 107 C. Descending these hills (and we are talking gentle hills) the engine temperature dropped down to 85 C. Exiting the freeway and driving surface streets at 35 mph to 40 mph resulted in nearly 100 C engine temperatures once again. And, yes both of the auxillary fans were running.This is the second E420 I've driven with apparent overheating problems. In both cases the sellers confessed that the cars had been overheated and fixed. I've spoken to one of my local dealers and they have nothing but praise for the
420 engine. They tell me that fan clutches commonly go out on these cars but the engines don't have any special overheating problems. My dealer also tells me that the cooling systems on these cars was unchanged from 1992 thru 1995.Should I be avoiding the 420 engine or do most of these things just run hot? Thanks in advance...